Let xi, i = 1, 2, ..., n be n observations and wi = pxi + k, i = 1, 2, ..., n where p and k are constants. If the mean of xi's is 48 and standard deviation is 12, whereas the mean of wi's is 55 and standard deviation is 15, then the value of p and k should be

Let xi, i = 1, 2, ..., n be n observations and wi = pxi + k, i = 1, 2,

1.	Let xi, i = 1, 2, ..., n be n observations and wi = pxi + k, i = 1, 2, ..., n where p and k are constants. If the mean of xi's is 48 and standard deviation is 12, whereas the mean of wi's is 55 and standard deviation is 15, then the value of p and k should be
A.	p = 1.25, k = -5
B.	p = -1.25, k = 5
C.	p = 2.5, k = -5
D.	p = 25, k = 5
Answer» B. p = -1.25, k = 5