a student was asked to find the arithmetic mean of the following 12 numbers: 3 ,7,9,15,13,8,19,17,21,14 and x. The mean was 12. The value of x is:
Answers
Answered by
1
Answer:
Step-by-step explanation:
First of all add all these numbers and then divide it by the total numbers.
= 3+7+9+15+13+8+19+17+21+14/10
=126/10
=12.6
Answered by
0
Answer:
6
Step-by-step explanation:
Mean of 12 numbers=3+7+9+15+13+8+19+17+21+14+x/11
=126+x/11
A.t.q
126+x/11 =12
=> 126+x=132
=>x=6
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