when a number x is added to the set of numbers 5,7,8,12,6,10,11 the new mean is 9 calculate the value of x
Answers
Answered by
0
Answer:
answer is 4/7
Step-by-step explanation:
previous mean + 7x/7 = 9
59/7 + x = 9
x = 4/7
Answered by
0
Answer
x=4
Explanation
Mean=Sum of all observations÷Total no of
observations
=> 9=5+6+7+8+10+11+x÷7
=> 9=59+x÷7
=> 9×7=59+x
=> 63=59+x
=> 63-59=x
=> 4=x
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