Question

A bag contains 100 cards on each card the number 1 -100 are written. Jack picks out a card from the bag.Find the probability that the number on the card contains a $0.$

• A. $\frac{5}{55}$
• B. $\frac{10}{90}$
• C. $\frac{10}{100}$
• D. $\frac{15}{25}$

Answer 1

The correct option is C $\frac{10}{100}$

Given $100$ cards numbered $1-100$

Favorable outcomes are $\{10,20,30,40,50,60,70,80,90,100\}$

$n\left(S\right)=100$

$P\left(E\right)=\frac{n\left(E\right)}{n\left(S\right)}$

$P\left(E\right)=\frac{10}{100}=\frac{1}{10}$