Question

A box contains cards which are numbered from 0 to 100. Write the probability

of getting a card at random, having an even natural number.

Answer 1

here, n(s)=100
an even natural number=50
P(an even no.)=50/100
=1/2.

Answer 2

Total number of cards in the box = 101

Even natural numbers starts from 2 ..... 100

a = 2
d = 2
l = 100

a+(n-1)d = 100
(n-1)d = 100-2 = 98
(n-1) = 98\2
(n-1) = 49
n = 50

So even natural numbers are 50

P(E) = 50/101

Hope this helps!!
cheers!! (:

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