# The average weight per fish of 4 fish in a basket is 220 grams . if the biggest fish weighing 310 gms jumps back in to the river what is the average weight of the remaining fish.

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weight of 4 fish = 220 *4

weight of 4 fish = 880

880 - 310 / 3 = average weight of 4 fish

average weight of the 3 fish = 570 / 3

average weight of 4 fish = 190

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a/4 + b/4 + c/4 + 310/4 = 220

a/4 + b/4 + c/4 + 77.5 = 220

a/4 +b/4 +c/4 =220 - 77.5 = 142.5

By multiply both sides of equation by 4/3 we get

a + b + c/3 = 142.5*4/3

a + b + c/3 = 190

average of weight after jumping = 190