Question

Chen has an MP3 player called the Jumble. The Jumble randomly selects a song for the user to listen to. Chen's Jumble has 4 classical songs, 3 rock songs, and 22 rap songs on it. Chen is going to listen to 360 songs.

What is the best prediction for the number of times Chen will listen to a classical song?

Answer 1

Close to 160 times but probably not exactly 160 times.

Explanation:

Khan Academy

Answer 2

Nearly 50 times

Explanation:

Chen's Jumble has 4 classical songs, 3 rock songs, and 22 rap songs on it, 4 + 3 + 22 = 29 songs in total.

The probability to listen the classic song is

`\frac{\text{Number of classic songs}}{\text{Total number of songs}}=(4)/(29)`

Chen is going to listen to 360 songs. Then the predicted number of times Chen will listen classic songs is

`360* (4)/(29)=(1,440)/(29)\approx 49.7\approx 50`