Mathematics

Isabell Shepard

31 December, 13:43

A message center receives calls from 6 p. m. until 6 a. m. Typically, 50% of the calls come in between 6 p. m. and 9 p. m.; 25% of the calls come in between 9 p. m. and midnight; 20% of the calls come in between midnight and 3 a. m.; and 5% of the calls come in between 3 a. m. and 6 a. m.

What is the probability that a call will come in between 6 p. m. and midnight?

Question 5 options:

25%

50%

55%

75%