Question

60 students appeared in an examination. On average they got 45 marks. Those who Dance
got on an average 55 marks and those who failed got on an average 30 marks. Find out the
number of candidates who passed.
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Answer 1

Answer:

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Answer 2

Answer:

Number of passed students = 36

Step-by-step explanation:

Number of students = 60

Average marks score = 45

let the no. of failed students= x

no. of passed students=60-x

avg. marks of students=45

total marks of students= 60*45=2700

avg. marks of failed students= 30

total marks of failed students=30x

avg. marks of passed students=55

total marks of passed students= 55*(60-x)

therefore,

30x+55(60-x)= 2700

30x+3300–55x= 2700

-25x = -600

x = 24

so the no. of students passed = 60 - 24 = 36