There are two schemes in Vodafone mobiles. First scheme :1 paise per second, Second scheme :50 paise per minute, Following conditions are given - 1) In second scheme, second minute will be started at 0:60 or 1:00, 2) 0 sec. call means to call and cut it abruptly when timer reads 0:00, this is equivalent to a call of 1 sec. 3) In first scheme 0:14 means 15 sec. The probability that first scheme is more profitable over second in a call ranging from 0:00 (1 sec.) to 3:20 (201 sec.) is ?

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01 Oct 2014 Probability There are two schemes in Vodafone mobiles. First scheme :1 paise per second, Second scheme :50 paise per minute, Following conditions are given - 1) In second scheme, second minute will be started at 0:60 or 1:00, 2) 0 sec. call means to call and cut it abruptly when timer reads 0:00, this is equivalent to a call of 1 sec. 3) In first scheme 0:14 means 15 sec. The probability that first scheme is more profitable over second in a call ranging from 0:00 (1 sec.) to 3:20 (201 sec.) is ?: OPtion
1) 139/201
2) 17/25
3) 139/200
4) 4/25
5) 17/50
6) 136/201
7) 100/201
8) 1/2
9) 1/4
10)None of these; Correct Option: 6 Best Solution (7)

RAKESH 10 years AGO

1st is profitable 4
1-49 sec, 61-99 sec (b4 1:00)
121-149sec (for 48 sec as starts from 1:00)
181-199 sec (b4 2:00)
total = 49+39+29+19 = 136

p = 136/201

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Mahesh 10 years AGO

The first scheme is profitable from 0 to 48 seconds, because in all these cases the first scheme will be costing 50 paise. so 49 instances
Similarly, it is profitable from 60 to 98, which is 39 instances
It is profitable from 120 to 148 which is 29 instances
It is profitable from 180 to 198 which is 19 instances
total instances= 49+39+29+19=136
Required probability=136/201

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santosh kumar patel 10 years AGO

The ranges of the first scheme is more profitable over second in a call ranging from 0:00 (1 sec.) to 3:20 (201 sec.) is

0-48, 60-98, 120-148, 180-198,

Hence total seconds of the first scheme is more profitable over second are 136.
Therefore probability that first scheme is more profitable over second in a call ranging
from 0:00 (1 sec.) to 3:20 (201 sec.) is 136/201.

Like? Yes (3) | No

sowmiya 10 years AGO