Answer:
The estimated number of defective phones produced each day is 0.3×t1000
Step-by-step explanation:
The proportion of phones that were found defective is given by the following equation
Proportion of defective phone = (Number of defective phone)÷(Number of sampled phone)
∴ Proportion of defective phone = 9÷30 = 3÷10 = 0.3 or 30%
Therefore, based on the proportion, if t1000 telephones are produced, the estimated number of defective phones produced each day will be as follows
Proportion of defective phone × Number of produced phone
= 0.3 × t1000
The estimated number of defective phones produced each day = 0.3×t1000.
