Question

9. Mary works in a factory that produces 1,000 telephones each day. When 30 telephones were sampled, it was found that 9 were defective. Estimate how many telephones are defective each day. (1 point) 314 telephones 284 telephones 300 telephones 310 telephones

Answer 1

Determine the ratio of defective telephones
ratio = 9/30
ratio = 3/10
3 of 10 telephones are defective

Determine the number of defective telephones each day
def telephone = ratio of defective × total production
def telephone = 3/10 × 1000
def telephone = 300

There are 300 defective telephones each day