If the mean of the data set is 84 points, find Haruka's final exam score in chemistry. Final exam Score on a 100 -point scale
Astronomy72
Biology 85
Physics 92
Chemistry ??

Haruka's final exam score in chemistry is 87

Step-by-step explanation:

Given mean of data set = 84

given score

Astronomy 72

Biology 85

Physics 92

Chemistry ?

we have to find score of chemistry

let the score of chemistry be x

we know that mean is sum of data set divided by no of terms in data set

mean = sum of data set /no of terms in data set

number of terms in our problem is 4 (Astronomy,Biology,Physics,Chemistry)

sum of set

72+85+92+x = 249+ x

as mean is 84,

hence

84 =  (249+ x)/4

=> 84*4 = 249 + x

=> 336 = 249 + x

=> 336 - 249 = x

=> x = 87

Thus, Haruka's final exam score in chemistry is 87.

step-by-step explanation:

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