Question

A manufacturer of springs tests a random sample of 150 springs and finds that 2 springs fail a stress test. The manufacturer will ship 5000 springs in its next shipment.

What is the best prediction for the number of springs in the next shipment that will fail under stress?

150

75

133

67

EDIT: the answer is 67

Answer 1

2/150=x/5000
=>150x/10,000
= 66.6 repeating
=67 if you're to round it