Videocon electronics has launched two new mobile hands sets: set i and set ii. Set i is cheaper as compared to set ii. But set ii has a built-in device to recharge the battery with an auto-cut power supply when it is fully charged. In a lot, there are 250 pieces of set i and 100 pieces of set ii. If a mobile is picked at random, then find the probability of getting set ii.

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Detailed Solution

Given, videocon electronics has launched two new mobile hands sets: set i and set ii. Set i is cheaper as compared to set ii. But set ii has a built-in device to recharge the battery with auto-cut power supply when it is fully charged. In a lot, there are 250 pieces of set i and 100 pieces of set ii.
The probability of an event occurring is calculated by dividing the number of favourable outcomes by the total number of outcomes that is,

Probability of an event = Number of favourable outcomes Total number of outcomes

Determine the possible outcomes of an arrow resting at any place.
The number of pieces of set ii is 100 the total number of set i and ii pieces is 250+100=350.
Determine the probability that the selection is of set i by dividing the number of favourable outcomes by the total number of possible.