Posted by MJ on Monday, March 8, 2010 at 1:01pm.
The mean height of 20 boys and 14 girls is 161 cm. If the mean height of the 14 girls is 151 cm, calculate the mean height of the 20 boys.

Math  Arfa, Sunday, April 10, 2016 at 1:39am
161*20+14=x
161*34= x. 5474cm=x
14*15=2114cm
54742114=3360
Height of boys = 168 cm

Math  Steph, Monday, July 4, 2016 at 11:16am
The Total height of 34 children = 161 x 34 = 5474 cm. Height of 14 girls =
14 x 151 = 21145474 heightt of 20 boys = 3360/20 mean heightt of boys
= 168.
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