Question

If he mean of 3,4,6,9,a 10 is 7 find the value of a
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Answer 1

Explanation:

Mean =7

⇒(3+4+6+9+a+10)/6=7

⇒32+x=42

⇒x=10

Answer 2

10

Explanation:

7*6=3+4+6+9+a+10

42=32+a

42-32=a

a=10