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The mean of 19 students is 126cm. Another student joins the group and the mean becomes 128cm. What is the height of the new student?
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The mean of 19 students is 126cm.

Another student joins the group and the mean becomes 128cm.
What is the height of the new student?

User Niru Mukund Shah
by
4.4k points

1 Answer

4 votes

Answer: 166 cm

Explanation:

x / 19 = 126

* 19 * 19

x = 2394

(2394 + y) / 20 = 128

* 20 * 20

2394 + y = 2560

- 2394 - 2394

y = 166

User Niels Van Der Tak
by
3.7k points
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