Question

The types of refrigerators, the probability of machines failing in a year, and their repair cost are given in the table.

Answer 1

Verify each option

Multiply the probability by the repair cost

so

A1 ----->0.25*10=2.5

B2-----> 0.23*8=1.84

C3 -----> 0.4*9=3.6

A4 ----> 0.35*8.5=2.975

therefore

the best refrigerator is B2

because the probability of failing is the less value and its repair cost is the less value too