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..?

• 37.4 %
  Mean of attendance = 49*40+35*53/( 49+53) = 3815/102 = 37.4019%
• 13 years agoHelpfull: Yes(10) No(0)
• (49*40+53*35)/(49+53) = 37.4%
• 13 years agoHelpfull: Yes(3) No(0)
• 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
• 13 years agoHelpfull: Yes(3) No(2)