2) The mean height of the 30 children in a room is 76 cm. James, whose
height is 107 cm went into the room.
What is the new mean of the height of the children in the room?
Answers
Answered by
3
Answer:
- The new mean is 77cm
Step-by-step explanation:
If the mean height of the 30 children in a room is 76 cm, then the sum of their ages is
30 x 76 = 2280 cm
If James with height 107cm joins them, then the total number of children now becomes 30+1=31 and the total height becomes: 2280cm+107cm=2387cm
x = 2387/31 = 77 cm
The new mean now becomes: 77 cm
Answered by
1
Answer:
30*76=2280
2280+107=2387
2387/31=77
Step-by-step explanation:
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