Latest Others Aptitude Question SOLUTION: The arithmetic mean of attendence of 49 students of class A is 40% and that of 53 students of class B is 35%.then the arithmetic mean of attendence of class A and B is..?

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The arithmetic mean of attendence of 49 students of class A is 40% and that of 53 students of class B is 35%.then the arithmetic mean of attendence of class A and B is..?

Asked In Others sanjeev (13 years ago)

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Bimal  (13 years ago)

37.4 %
Mean of attendance = 49*40+35*53/( 49+53) = 3815/102 = 37.4019%

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Pinaki Ninad Kulkarni  (13 years ago)

(49*40+53*35)/(49+53) = 37.4%

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Dimple  (13 years ago)

Pls check this qn. How many 4 or 5 digit numbers can be formed by using 0, 1, 3, 5, 8. Repetition is not allowed. None of the given options is correct. No. of 4 digit nos that can be formed by using 0, 1, 3, 5, 8.( Repetition is not allowed.)=4*4*3*2=96 No. of 5 digit nos that can be formed by using 0, 1, 3, 5, 8.( Repetition is not allowed.)=4*4*3*2*1=96 Total No. of 4 digit or 5 digit nos that can be formed by using 0, 1, 3, 5, 8.( Repetition is not allowed.)=96+96=192

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