Question

In one shift, a certain disc jockey plays 11 rock songs, 17 jazz standards, and 7 disco tunes. What percent of the songs he plays are disco tunes? A. 7% B. 20% C. 31% D. 49% Provide an explanation :)

Answer 1

B. 20%

Explanation:

Sum = 11+17+7

= 35

fraction of disco tunes = 7/35

percent of disco tunes = 7/35 x 100

= 20%

Hope it helps you!!!

Answer 2

B

Explanation:

He plays a total of 11 + 17 + 7 = 35 songs of which 7 are disco, thus

percent of disco =
`(7)/(35)` × 100% =
`(1)/(5)` × 100% = 20% → B