The total number of black, white and red beads was 120 at first. The number of
black beads was doubled. The number of white beads was tripled. Another 23 red
beads were added. There was an equal number of black, white and red beads
now. How many red beads were there at first?
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Answered by
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Step-by-step explanation:
P (of red ball) =1−(
10
3
+
5
2
)
=1−(3+
10
4
)
=1−
10
7
=
10
10−7
P (of red ball) =
10
3
No. of black balls =
totalno.ofballs
20
5
2
=
totalno.ofballs
20
⇒50 = total no. of balls
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