A shopkeeper buys a quantity of oranges. On Thursday 2/7 were sold, on Friday 3/8 and on Saturday 1/5. If 156 oranges remain unsold, how many were sold on Friday?
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let the original number of orange be x
total orange sold = 2x/7 + 3x/8 + x/5 = 241x/280
Oranges left = x - 241x/280 = 39x/280
now, 39x/280 = 156
x = 1120 were there.
According to question
number of oranges sold on Friday = 3/8 * 1120
= 420 Oranges were sold on Friday.
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