Pre-Algebra Answer 1

Pre-Algebra Answer 1:

1. A radio station offers free competitions. Normally, one in every twenty contestants wins the free competition. What is the probability of losing the free competition?

A. 1/20

B. 1/19

C. 19/20

D. 19/1

E. 20/19

The correct answer is C.

The probablility of success is represented by the fraction ¹/20.

The probability of losing is therefore:

²⁰/20 - ¹/20 = ¹⁹/20

NOTE: Fractions are slightly different than ratios.

¹/20 = 1 in 20 (so there are 20 parts in total)

1: 20 = 1 to 20 (so there are 21 parts in total)

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