Hundred identical cards are numbered from 1 to 100. The cards The cards are well shuffled and then a card is drawn. Find the probability that the number on card drawn is:
greater than 85
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Solution
There are 100 cards from which one card is drawn.
Total number of elementary event =n(s0=100
From numbers 1 to 100 there are 15 numbers which are greater than 85 i.e {86,87,.......98,99,100} favorable number of event =n(E) =15
Probabilty of selecting card with a number greater than 85=
`(n(E))/(n(s))-15/100-3/20`
Concept: Type of Event - Complementry
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