If a normal distribution has a mean of 154 and a standard deviation of 15, what is the value that has a z-score of 2.2?
a. 166
b. 196
c. 187
d. 208

Option c. is correct

Step-by-step explanation:

The standard deviation is a measure of the amount of dispersion in a set of values.

Mean of a normal distribution (m) = 154

Standard deviation (s) = 15

z-score = 2.2

To find: value (x) that has a z-score of 2.2

z-score is given by

Put

Option c.is correct

(n^3 - n)

= n(n-1)(n+1)

since it is divisible by 3 and 2 ,because it is a multiple 3 consecutive number

if, n-1 is odd then n+1 is also odd, then it is a multiple of 9

but if, n-1 is even then n+1 is also even, then it is a multiple of 4

so, largest multiple = max(9*2, 4*3) = max(18, 12) = 18

sorry not sure

step-by-step explanation: