Smith is a weld inspector at a shipyard. He knows from keeping track of good and substandard welds that forthe afternoon shift 5% of all welds done will be substandard. If Smith checks 300 of the 7500 welds completedthat shift, what is the probability that he will find less than 20 substandard welds

0.9066

Step-by-step explanation:

According to the question, the data provided in the question is as follows

Probability =  p = 0.05

Sample size = n = 300

Total welds = 7,500

Based on the above information, the probability for less than 20 substandard welds is

As per binomial distribution, the normal approximation is

= 15

= 3.77

= 1.32

Therefore, the probability is 0.9066

step-by-step explanation:

step-by-step explanation:

ok so im not 100% sure but you would start by adding 5.1t and 1.9t beacuse they have the same variable. that is 7t.   then add -3.6 + 1.2 which is -2.4

so then keep that as -2.4 + 7t. i apologize if this is incorrect. best luck on your test < 3