Mac has 25 marbles, of which 20% are red. Thayer has 20 marbles, of which 75% are not red. What is the absolute difference between the numbers of red marbles they have?

1 Answer
Alan P.
Nov 11, 2016

#0#

Explanation:

Mac has #20%# of 25 red marbles
#color(white)("XXX")=20/100xx25=5# red marbles.

Thayer has 20 marbles of which #75%# are not red
#rarr# #25%# of Thayer's 20 marbles are red.
#color(white)("XXX")=25/100xx20 =5# red marbles.

Therefore each of them has #5# red marbles
and the (absolute) difference between the number of red marbles they have is zero.

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