Question

Reverse mean higher GCSE questions.

Pete has seven Shetland ponies. They have a mean height of 116cm.
Pete buys an eighth pony. The height of this pony is 128cm.
Find the mean height of all eight ponies.

Answer 1

To find the new mean height after adding an eighth pony with a height of 128 cm to seven ponies with a mean height of 116 cm, calculate the total height of all ponies and then divide by the number of ponies, resulting in a mean height of 117.5 cm.

Step-by-step explanation:

The subject of this question is Mathematics and it targets students at a High School level. To calculate the new mean height after Pete buys an eighth pony, you need to follow these steps:

First, calculate the total height of the initial seven ponies by multiplying the mean height by the number of ponies (116 cm x 7 = 812 cm).

Add the height of the eighth pony to this total (812 cm + 128 cm = 940 cm).

Divide the new total height by the number of ponies to find the new mean height (940 cm / 8 ponies = 117.5 cm).

The mean height of all eight ponies is 117.5 cm.

Answer 2

dat it

116cm times 7=812

128cm times 8=1024

1024-812=212cm