Mathematics

5, 8, 6 and k occur with frequency 3, 2, 4, and 1 respectively an…

5, 8, 6 and k occur with frequency 3, 2, 4, and 1 respectively an d have a mean of 5.7. Find the value of k
  • A.
    4
  • B.
    3
  • C.
    2
  • D.
    1
Correct Answer: Option C
Explanation
xffx
5315
8216
6424
kik
f=10fx=55+k
Mean =fx
fx
5.7 =55+k
10

57 = 55 + k
k = 57 – 55
k = 2