# Find the class marks of classes 10 - 25 and 35 - 55.

Class Mark = Upper Limit + Lower Limit / 2

Class Mark 1st = (25+10)/2 = 35/2 = 17.5

Class mark 2nd = (35+55) = 90/2 =45

Thanks

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UPPER LIMIT + LOWER LIMIT   =  CLASS MARK
2

CLASS MARK OF 10 - 25 :
25+ 10 = 35  = 17.5
2          2

CLASS MARK OF 35 - 55:
55 + 35 = 90 =  45
2           2

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10 + 25 /2
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Genaeral Folrmula for finding class mark =    Upper Limit + Lower Limit/2

Therefore,
Class Mark for 10-25 =    25+10/2
=     35/2
=     17.5

Class Mark for 35-55 =   55+35/2
=    90/2
=    45

THANKS!!!

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Www.cbse.com reg no p/1/18/52085/0285
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question in 2010 and answer in 2018

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17.5 and 45
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Class marks = (upper limit + lower limit)/2. Class marks of 1st= (10+25)/2 = 35/2 = 17.5. Class marks of 2nd = (35+55)/2 = 90/2 = 45
• 0
45 and 17.5
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We know that,
Upper limit + lower Limit /2 = Class mark
By using this formula ,
(Q.1) 10-25
(Ans)-    10+25/2
35/2 = 17.5

(Q.2)  35-55
(Ans)-   35+55/2 = 90/2
=45

So the answer of your question is = 17.5 and 45 repectively..
..
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