question no. 2 plz answer it
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formula for combined mean
=( n1x1+ n2x2 +.... )/(n1+n2+...)
here n1 = 10
n2 = 15
x1 = 20
x2 = 50
thus combined mean
=( 20*10+15*50)/(10+15)
= 950/25
= 38
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Answer:
38
Step-by-step explanation:
combined mean=[(X1 * n1)+(X2 *n2)]/n1+n2
=[20*10 + 50*15]/25
=950/25
=38
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