Question

The mean of 8,7,6,5,(a-5) is 6 find the value of A

Answer 1

Answer:

a=9

Step-by-step explanation:

mean= Sum of all observation/total number of observation

so sum of all observation=8+7+6+5+(a-5)

                                          =21+a

number of observation=5

so

6=(21+a)/5

30=21 + a

a=9