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a string of pearls such that 1/3 is lost and of that 1/4th is missing, remaining is 20 then actual number of pearls?ans. 40
answer is 48 not 40......... 16 are lost and 12 are missing.....
Let total Number of pearls be x
number of pearls lost = x/3
number of pearls missing = x/4
remaining = 20
==> x = x/3 + x/4 + 20
==> x = (4x+3x)/12 + 20
==> x = (7x + 240) / 12
==> 12x = 7x + 240
==> 5x = 240
==> x = 240/5 = 48 !!
therefore total number of pearls originally is 48 !
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