The mother divided her three children's oranges in a ratio of 6:5:4. Two children gave 45 oranges. How many oranges were there?

Correct answer:

n =  75

Step-by-step explanation:

a:b:c=6+5+4 a+b=45  b+c=45  c+a=45  k1=6+5+46=52=0.4 k2=6+5+45=310.3333 k3=6+5+44=1540.2667  q1=k1+k2=52+31=156+155=156+5=15110.7333 q2=k1+k3=52+154=156+154=156+4=1510=320.6667 q3=k3+k2=154+31=154+155=154+5=159=53=0.6  n1=45/q1=45/1511=45:1511=45 1115=1145 15=1167561.3636 n2=45/q2=45/32=45:32=45 23=245 3=2135=67.5 n3=45/q3=45/53=45:53=45 35=345 5=3225=75  n=n3=75  a=k1 n=52 75=52 75=5150=30 b=k2 n=31 75=31 75=375=25 c=k3 n=154 75=154 75=15300=20  n=75

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