Question

A bag contains 100 cards on each card the number 1 -100 are written. Jack picks out a card from the bag. What is the probability that the number on the card is divisible by $7$

• A. $\frac{7}{50}$
• B. $\frac{8}{90}$
• C. $\frac{17}{100}$
• D. $\frac{1}{10}$

Answer 1

Answer: (A)

$\frac{7}{50}$

No of favorable outcomes are $\{7,14,21,28,35,42,49,56,63,70,77,84,91,98\}$
$P\left(E\right)=\frac{14}{100}=\frac{7}{50}$