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Question

The average of x,y and z is 25. x is as much more than the average as y is less than the average. Find the value of z.

x,y और z का औसत 25 है। x का मान औसत से जितना अधिक है y का मान औसत से उतना ही कम है। z का मान ज्ञात कीजिए।

A

25
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B

28
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C

32
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D

35
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Solution

The correct option is A
25
Let y be ‘a’ less than 25 so that x will be ‘a’ more than 25.

i.e., x=25a and y=25+a

Now, from (1)

x+y+z=75

25a+25+a+z=75

50+z=75

z=7550

z=25

Hence, z=25
दिया है x, y, z का औसत मान =25

x+y+z3=25

x+y+z=75............1

माना y, a अधिक है 25 से और x, a कम है 25 से

समीकरण 1 से

x+y+z=75

25a+25+a+z=75

50+z=75

z=7550

z=25



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