there are 500 students in a class out of them 200 are of bio and 300 is of math and all study physics and chemistry average of physics is 80 math is 90 chemistry 70 and bio is 60 find average of class
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Answer:
228
Step-by-step explanation:
Total Students = 500
Bio Students = 200
Bio Average = 60
Bio Score = 200 * 60 = 1200
Math Students = 300
Math Average = 90
Math Score = 300 * 90 = 2700
Chemistry Students = 500
Chemistry Average = 70
Chemistry Score = 500*70 = 3500
Physics Students = 500
Physics Average = 80
Physics Score = 500*80 = 4000
Total Score obtained = 1200 + 2700 + 3500 + 4000
= 11400
Total Students = 50
Average of Class = 11400/50 = 228
amitnrw:
because this average is not per subject
its about all class
even its wrong its can not go Beyond 90or less than 60
each student have 3 subjects so per subject average will be 228/3 = 76
yaaa
but question is not about per subject. hope u have understood now.
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