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प्रश्न
Cards numbered 7 to 40 were put in a box. Poonam selects a card at random. What is the probability that Poonam selects a card which is a multiple of 7?
उत्तर
There is a total of 34 cards numbered from 7 to 40.
Numbers multiple of 7 is 7, 14, 21, 28 and 35.
total number of favorable outcomes = 5
Let E be the event that Poonam selects a card which is multiple of 7.
`"P"("E") =("Number of cards which are multiple of 7")/("Total number of cards")`
⇒ P(E) `=5/34`
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