The Mean of Three numbers x,y and z is 6 and the mean of five numbers x,y,z,a and b is 8.What is the mean of a and b?
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Mean =(x+y+z)/3
6=(x+y+z)/3
18=x+y+z
AND
Mean=(x+y+z+a+b)/5
8=(x+y+z+a+b)/5
40=(x+y+z+a+b)
40=18+a+b
40-18=a+b
22=a+b
Mean of a and b is (a+b) /2
Mean =22/2
Mean=11
6=(x+y+z)/3
18=x+y+z
AND
Mean=(x+y+z+a+b)/5
8=(x+y+z+a+b)/5
40=(x+y+z+a+b)
40=18+a+b
40-18=a+b
22=a+b
Mean of a and b is (a+b) /2
Mean =22/2
Mean=11
Dark13:
Thnx
Your welcome
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