pls solve it guys correct answer will be brainlist...
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BY USING MEAN FORMULA
X1 +X2.......X50/50 = 40----(1)
x1+ x2.....X50 = 2000
x1 + x2 .........X100/100 = 50
x51+ x52.....x150 = 5000---(2)
ADD 1 AND 2 EQ
X1 + X2 + .......X150 = 7000---(3)
FINDING MEAN FOR EQ 3
X1+x2.......X150/150 = 7000/150
mean of 150 students comined is 46.66
MARK ME AS BRAINLIEST IF I AM CORRECT