The mean of 50 students is 40 and that of other 100students is 50, then the combined mean of group of 150 is
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sum of 50 = 50 x 40
=> 2000
sum of 100 = 100 x 50
=> 5000
Total mean = 7000/150
=> 140
Answered by
0
Answer:
46.67
Step-by-step explanation:
((50*40)+(100*50))/150
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