omar ordered his sister a birthday card from a company that randomly selects a card from their inventory…

omar ordered his sister a birthday card from a company that randomly selects a card from their inventory. the company has 21 total cards in inventory. 14 of those cards are birthday cards. what is p(not a birthday card)? if necessary, round your answer to 2 decimal places.

omar ordered his sister a birthday card from a company that randomly selects a card from their inventory. the company has 21 total cards in inventory. 14 of those cards are birthday cards. what is p(not a birthday card)? if necessary, round your answer to 2 decimal places.

Answer

Explanation:

Step1: Find number of non - birthday cards

Total cards = 21, Birthday cards = 14. Non - birthday cards = 21 - 14 = 7.

Step2: Calculate probability of non - birthday card

Probability formula is $P(A)=\frac{\text{Number of favorable outcomes}}{\text{Total number of outcomes}}$. Here, $P(\text{not a birthday card})=\frac{7}{21}=\frac{1}{3}\approx0.33$.

Answer:

0.33