Answer:
21
Step-by-step explanation:
To find the number of defective items in a sample size n, the number is given by
E=np
Where p is the probability and n is the sample size.
Probability is given as 3/250=0.012
Sample size is given as 1750 boards
By substituting 0.012 for p and 1750 for n then the expected defective boards will be
E=0.012*1750=21
Therefore, it is likely that 21 boards are defective.
