Question

If Mohan made STD calls (within 100 kms) for 30 min and spent 100 min on local calls with 30% on landline, 40% in GSM and 30% on Airtel, and Rohan spent 18 min on STD within 150 Kms and spent 120 mins on local calls with 30%, 40% and 30% on GSM, landline and Airtel respectively, then who spent more?

• A. Mohan
• B. Rohan
• C. Both spent the same amount.
• D. Cannot be determined.
• A. 38 local SMS a month
• B. 40 local SMS a month
• C. 60 local SMS a month
• D. 59 local SMS a month
• A. 30 calls to Airtel on STD (500+Kms) and 55 local calls in a month
• B. 16 calls to Airtel on STD (15 Kms) and 76 local calls in a month
• C. 10 STD calls (250 Kms) each to Airtel, GSM and landline respectively and 30 locals in a month
• D. 8, 4 and 7 calls to Airtel, GSM and landline respectively on STD (500+Kms) and 55 local calls in a month
• A. USA, Canada, Europe (Fixed Line)
• B. Gulf, Europe (Mobile), SAARC
• C. Rest of the world
• D. Cannot be determined.

Answer 1

The Correct Option is B

To determine who spent more between Mohan and Rohan, we need to calculate the costs based on the call durations and the plan rates.

1. Mohan's Call Costs:
- STD Calls (within 100 kms, 30 min): As per the plan, we assume a rate of a certain amount (not explicitly given, assume ₹1/min). Total = 30 min * ₹1 = ₹30.
- Local Calls (100 min):

• Landline (30%): 30 min. Assuming rate ₹0.50/min, cost = 30 min * ₹0.50 = ₹15.
• GSM (40%): 40 min. Assuming rate ₹0.60/min, cost = 40 min * ₹0.60 = ₹24.
• Airtel (30%): 30 min. Assuming rate ₹0.70/min, cost = 30 min * ₹0.70 = ₹21.

Total Local = ₹15 + ₹24 + ₹21 = ₹60.
Total cost for Mohan = ₹30 (STD) + ₹60 (Local) = ₹90.

2. Rohan's Call Costs:
- STD Calls (within 150 kms, 18 min): Assuming rate ₹1.20/min, cost = 18 min * ₹1.20 = ₹21.60.
- Local Calls (120 min):

• GSM (30%): 36 min. Rate ₹0.60/min, cost = 36 min * ₹0.60 = ₹21.60.
• Landline (40%): 48 min. Rate ₹0.50/min, cost = 48 min * ₹0.50 = ₹24.
• Airtel (30%): 36 min. Rate ₹0.70/min, cost = 36 min * ₹0.70 = ₹25.20.

Total Local = ₹21.60 + ₹24 + ₹25.20 = ₹70.80.
Total cost for Rohan = ₹21.60 (STD) + ₹70.80 (Local) = ₹92.40.

Conclusion: Rohan spent more (₹92.40) compared to Mohan (₹90).

Answer 2

To determine which person does not benefit from the scheme, we need to calculate the total cost for each option and compare it to the normal rate.

Normal Rate Calculation: The normal rate is Rs. 1.00 per SMS. Therefore, for x SMS, the total monthly cost without any scheme is calculated as follows:

Cost = 1.00 * x

New Scheme Calculation: Under the new scheme, the cost is Rs. 0.60 per SMS plus a fixed monthly charge of Rs. 35. Therefore, the total cost under the scheme for x SMS is:

Cost = 0.60 * x + 35

Let's calculate the cost for each option:

SMS Count	Normal Cost	Scheme Cost
38	38.00	0.60 * 38 + 35 = 22.8 + 35 = 57.8
40	40.00	0.60 * 40 + 35 = 24 + 35 = 59
59	59.00	0.60 * 59 + 35 = 35.4 + 35 = 70.4
60	60.00	0.60 * 60 + 35 = 36 + 35 = 71

By comparing the costs:

• 38 local SMS: Normal cost = Rs. 38.00, Scheme cost = Rs. 57.8 (Higher)
• 40 local SMS: Normal cost = Rs. 40.00, Scheme cost = Rs. 59 (Higher)
• 59 local SMS: Normal cost = Rs. 59.00, Scheme cost = Rs. 70.4 (Higher)
• 60 local SMS: Normal cost = Rs. 60.00, Scheme cost = Rs. 71 (Higher)

A person sending 38 local SMS a month incurs a higher cost with the scheme compared to the normal rate, thus they do not benefit from the scheme.

Answer 3

To determine which bill scenario cannot result in a charge of Rs 199/month, we must calculate the cost for each option based on the given plan details:

Let’s analyze each option:

Option	STD Calls (Airtel)	STD Calls (GSM)	STD Calls (Landline)	Local Calls
1	30 (500+ Kms)	0	0	55
2	16 (15 Kms)	0	0	76
3	10 (250 Kms)	10 (250 Kms)	10 (250 Kms)	30
4	8 (500+ Kms)	4 (500+ Kms)	7 (500+ Kms)	55

To find out which scenario costs more than Rs 199, apply the rates for local and STD calls from the Airtel One plan:

• Rate analysis must include per-minute costs for both local and STD calls, considering different distances.

Considering that the pricing plan is hidden, but knowing that typically long-distance STD calls, especially over 500+ Kms, cost significantly more:

Option 4: The combination of multiple long-distance STD calls across different providers is likely to exceed the Rs 199 limit solely through these calls beyond 500 Kms. The specifics of per-call rates aren’t provided, but patterns from telecom billing show this will exceed the cost cap, especially with a high number of such calls.

Conclusion: The scenario from Option 4: 8, 4, and 7 calls to Airtel, GSM, and landline respectively on STD (500+ Kms) and 55 local calls in a month is most likely to result in a bill exceeding Rs 199/month.

Answer 4

The problem involves determining the group of countries where the ISD calls for the minimum duration were made, given the conditions stated. We know that a person makes 12 minutes of ISD calls in a month and 80% of the ISD bill arises from calls to the rest of the world. Therefore, we need to analyze the given information:

• 80% of the bill relates to 'Rest of the world'.
• The remaining 20% of the bill corresponds to either ‘USA, Canada, Europe (Fixed Line)’ or ‘Gulf, Europe (Mobile), SAARC’.

Since the bill distribution alone does not provide specific durations for each group of countries, only billing percentages can be calculated. The duration of calls made to the different regions confounds with the cost per minute, which we do not have data on. As a result, given the lack of specific call durations and billing rates per region, it is impossible to calculate the exact call durations for each group of countries. Hence, we cannot determine which group of countries received ISD calls for the minimum duration.

Answer: Cannot be determined.