Scores on performance following a training program are known to be approximately normal with the mean of 14 and variance of 4.

i) If those scoring below must be retrained. what percentage will have to be trained? what percentage will not be trained?

ii)What fraction of participant scored between 10 and 18

iii) If 50% of the participants withdrew because the got poor scores, find the cut of score obtained by these participants.

iv)find the probability of obtaining the score of exactly 6.

It is given that P(0