Question

cards marked with numbers 5-75 are placed in a box ans mixed thoroughly.One card is drawn from the box .Find the probability that the number on the card is even

Answer 1

total no. of events = (75-5)+1=71

no. of even nos in the box= (6,8,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40,42,44,46,48,50,52,54,56, 58,60,62,64,66,68,70,72,74)= 35 such cards

∴P(even numbered being drawn out)= 35/71

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Answer 2

favourable event (even card) = 35
total event (all cards including 5&75) = 71
probability = 35/71
=0.4929577465.........
=0.5 (approx)