Question

The following table describes the results of digital scales that are three years old. The random variable x represents the number of scales that failed to weigh accurately among six that were tested for accuracy of weight measurement. Find B. 0.222 the probability of getting three or more scales that failed to weigh accurately amongOC. 0.005 six scales that were tested. O A. 0.048 O D. 0.046 x P(x) 0 0.377 1 0.399 2 0.176 3 0.041 4 0.005 5 0+ 6 0+

Answer 1

P(3 or more scales failed to weigh accuracy among the six scales that were selected) = 1 - P(X < 3)

= 1 - [P(0) + P(1) + P(2)]

= 1 - (0.377 + 0.399 + 0.176)

= 0.048

Ans: A. 0.048