Question

there are 20 students in a class. they sit in pairs so that exactly one third of the boys sit with a girl, and exactly one half of the girls sit with a boy. total how many boys are there in the class?
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Answer 1

Answer:

Let there be 2G girls and 2B boys, 2G+2B=30, so B=15−G.

Let there be 2G girls and 2B boys, 2G+2B=30, so B=15−G.After seating half the girls with boys, we have G girls and (2B−G)=(30−3G) boys.

Let there be 2G girls and 2B boys, 2G+2B=30, so B=15−G.After seating half the girls with boys, we have G girls and (2B−G)=(30−3G) boys.For them to be equal, G=30−3G, which yields G=7.5, i.e. 15 girls and 15 boys at start.

Let there be 2G girls and 2B boys, 2G+2B=30, so B=15−G.After seating half the girls with boys, we have G girls and (2B−G)=(30−3G) boys.For them to be equal, G=30−3G, which yields G=7.5, i.e. 15 girls and 15 boys at start.I think that you will agree that it is rather difficult to seat two groups of 7.5 girls and 7.5 boys!

HOPE U GET IT

PLEASE MAKE ME BRAINLIEST

Answer 2

Answer:

Let there be 2G girls and 2B boys, 2G+2B=30, so B=15−G.

Let there be 2G girls and 2B boys, 2G+2B=30, so B=15−G.After seating half the girls with boys, we have G girls and (2B−G)=(30−3G) boys.

Let there be 2G girls and 2B boys, 2G+2B=30, so B=15−G.After seating half the girls with boys, we have G girls and (2B−G)=(30−3G) boys.For them to be equal, G=30−3G, which yields G=7.5, i.e. 15 girls and 15 boys at start.

Let there be 2G girls and 2B boys, 2G+2B=30, so B=15−G.After seating half the girls with boys, we have G girls and (2B−G)=(30−3G) boys.For them to be equal, G=30−3G, which yields G=7.5, i.e. 15 girls and 15 boys at start.I think that you will agree that it is rather difficult to seat two groups of 7.5 girls and 7.5 boys!

HOPE U GET IT

PLEASE MAKE ME BRAINLIEST

Step-by-step explanation: