Answer:
(a)0.0005
(b)0.2720
Step-by-step explanation:
Total Number of Transistors = 16
To find the probability that 4 selected at random are defective (or non-defective), we find the probability of the 1st, 2nd, 3rd, and 4th defective (or non-defective) items in that order, Note that the selection is without replacement.
(a)Probability that all are defective
Number of Defective Transistors =4
P(all are defective) ![=\dfrac{4}{16} \times \dfrac{3}{15} \times \dfrac{2}{14} \times \dfrac{1}{13}](https://tex.z-dn.net/?f=%3D%5Cdfrac%7B4%7D%7B16%7D%20%5Ctimes%20%5Cdfrac%7B3%7D%7B15%7D%20%5Ctimes%20%5Cdfrac%7B2%7D%7B14%7D%20%5Ctimes%20%5Cdfrac%7B1%7D%7B13%7D)
=0.0005
(b)Probability that none are defective
Number of Non-Defective Transistors =16-4=12
P(none are defective) ![=\dfrac{12}{16} \times \dfrac{11}{15} \times \dfrac{10}{14} \times \dfrac{9}{13}](https://tex.z-dn.net/?f=%3D%5Cdfrac%7B12%7D%7B16%7D%20%5Ctimes%20%5Cdfrac%7B11%7D%7B15%7D%20%5Ctimes%20%5Cdfrac%7B10%7D%7B14%7D%20%5Ctimes%20%5Cdfrac%7B9%7D%7B13%7D)
=0.2720
Answer:
15 because 3x5=15 and 60/4=15
Answer:4T
Step-by-step explanation:
T
Answer: answer should be 6.81
Step-by-step explanation:
Right now your number is 6.810, drop the zero to make it rounded to the nearest hundredth.