What is the probability that a number selected from the 101, 102, …, 140 is a multiple of 3 or 4.
1. 19/40
2. 1/2
3. 1/7
4. 8/40
5. 9/70
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Correct Answer – Option 2 : 1/2
Given
Total numbers = 40
Formula used
P(E) = Number of favourable outcomes/Total number of outcomes
Calculation
Let E is an event of drawing a card multiple of 3 or 4
Number of favourable outcomes = 20 i.e(102, 104, 105, 108, 111, 112, 114, 116, 117, 120, 123, 124, 126, 128, 129, 132, 135, 136 ,138 and 140)
P(E) = 20/40 = 1/2