cards marked with the number 2 to 101 are placed and mixed througly one card is drawn from this box find the probability that the number of the card is multiple of 5 .
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No. of cards = (101 - 2) + 1 = 100
[Because, number of numbers between a and b = (b - a) +1]
No. of multiples of 5 = 20 {5, 10, 15, 20, 25, 30, 35, 40, 45, 50, 55, 60, 65, 70, 75, 80, 85, 90, 95, 100}
P(getting a multiple of 5)
= No. of favourable outcomes/Total number of outcomes
= No. of multiples of 5/Total no. of cards
= 20/100
= 2/10
= 1/5 OR 0.2
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