Question

Simona's music book includes 50 piano tunes, of which 7 are by Bach, and 18 are by Mozart. If Simona chooses a tune at random, what is the probability that it is either by Bach or by Mozart? A) 0.22 B) 0.36 C) 0.50 D) 0.64

Answer 1

so it is 18+7 which is 25 and you make the fraction out of the total books (50).
the fraction is 25/50 which is 0.50 as a decimal

Answer 2

Answer:

Option c. 0.50

Step-by-step explanation:

Simona's music book includes piano tunes = 50

by Bach = 7

by Mozart = 18

Total  =  7 + 18 = 25

Probability of choosing a tune that it is either by Bach or by Mozart is

= $\frac{25}{50}$ = $\frac{1}{2}$

= 0.50

The probability that it is either by Bach or by Mozart is 0.50.

Option c.