A jar contains 125 marbles. Given 6% of the marbles are green, 6% of the marbles are blue, and the rest are red, how many red marbles are in the jar?

math

2 Answers
Nallasivam V
Feb 27, 2018

Red Marbles #=110#

Explanation:

Given -
Total Number of Marbles#=125#
Green Marbles #=6%#
Blue Marbles #=6%#
Read Marbles #=?#

Green Marbles#=125 xx 6/100=7.5#
Blue Marbles #=125 xx 6/100=7.5#

Red Marbles = Total Number of Marbles -[Number of Green Marbles + Number of Blue Marbles]

Red Marbles #=125 - (7.5+7.5)=125-15=110#

Red Marbles #=110#

Jim G.
Feb 27, 2018

#110#

Explanation:

#"consider 125 marbles to represent "100%#

#"then subtracting the percent of green/blue marbles"#

#"that is "100-6-6=100-12=88%larrcolor(red)"red marbles"#

#88%" of the marbles are red"#

#rArr88/cancel(100)^4xxcancel(125)^5=cancel(88)^(22)/cancel(4)^1xx5=5xx22=110#

#rArr"there are 110 red marbles in the jar"#

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