There are 30 cards, of same size, in a bag on which numbers 1 to 30 are written. One card is taken out of the bag at random. Find the probability that the number on the selected card is not divisible by 3.
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Probability that the number on the selected card is not divisible by 3 = 2/3
Step-by-step explanation:
Total cards = 30
Numbers divisible by 3 between 1 to 30 = 3, 6, 9, 12, 15, 18, 21, 24, 27, 30
Number of unfavorable outcomes = 10
Total outcomes = 30
So number of favorable outcomes = 30-10 = 20
Probability that the number on the selected card is not divisible by 3 = 20/30 = 2/3
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