There are 90,87,82,64,52 students in the fifth, sixth, seventh, ninth and tenth grade respectively of any school. What is the average student population of six classes in school ?
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Adding all the terms and then dividing the answer by number of terms
90+87+82+64+52=375
375/5=75
Average = 75
90+87+82+64+52=375
375/5=75
Average = 75
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