Question

Janice conducted a survey at the local calculator factory. She discovered that 10% of every 80 calculators did not work. Using this survey, what kind of predictions can she make about the next 400 calculators?
a-not enough information
b-40 will not work
c-5 will not work
d-8 will not work

Answer 1

what is 10% of 80 ?

Answer 2

correct,
10% of 80 is 8

so prob of fail = 8/80 = 1/10

so for 400 units, prob = (1/10(400)
=

Answer 3

40