1.If the mean of 4,5,a,6,6,9 and 11 is 10, then find the value of a+b.
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SORRY I DON'T KNOW AND THANKS FOR THE POINTS.
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Answer:
Step-by-step explanation:
mean=sum of observations/total number of observations
10 =4+5+6+9+11+a+b/7
10. =35+a+b/7
10*7 =35+a+b
70=35+a+b
70-35=a+b
35 =a+b
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