Question

Omar ordered his sister a birthday card from a company that randomly selects a card from their inventory. The company has 212121 total cards in inventory. 141414 of those cards are birthday cards.

What is \text{P(not a birthday card})P(not a birthday card)start text, P, left parenthesis, n, o, t, space, a, space, b, i, r, t, h, d, a, y, space, c, a, r, d, end text, right parenthesis?
If necessary, round your answer to 222 decimal places.

Answer 1

7/21

Explanation:

21-14 =7

Because to find the number of non-birthday cards you have to subtract

=7/21

Answer 2

70707 cards are not birthday cards.

That's about 33%.

Explanation:

Important information:

- total of 212121 cards

- 141414 birthday cards

Cards that are not birthday cards is represented by the expression

212121 - 141414.

Solve the expression by subtracting.

212121 - 141414 = 70707

What percentage of cards are not birthday cards?

Divide the # of not-birthday cards by the total # of cards.

70707 ÷ 212121 = 0.33333333333