Average


  1. The Average of 100, 200, 300, 400, ... , 1000 is 550. If each number is divided by 5, then the new average will be equal to









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    New average = Actual average / 5

    Correct Option: D

    Actual average
    =( 100 + 220 + 300 + ... + 1000 ) / 10
    =550

    New Average = 550 / 5
    =110


  1. A, B, C, D, E are the five electronic shops in the Naza market, which have 20, 30, 60, 80 and 50 T. V . sets with them respectively, then the average number of T. V. sets in each shop is









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    Average number of T. V. sets
    = ( 20 + 30 + 60 + 80 + 50 ) / 5

    Correct Option: B

    Average number of T. V. sets
    = ( 20 + 30 + 60 + 80 + 50 ) / 5
    = 48



  1. A, B, C, D, E, F are the only six families in Indira Nagar. A, B, C, D, E and F has 7, 8, 10, 13, 6, and 10 member in their families respectively. If 1 member from all the six families left their respective families to accommodate themselves in the hostel of IIM Lucknow, then the average number of member now in each family of Indira nagar is









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    Required average
    = (( 7 - 1 ) + ( 8 - 1 ) + ( 10 - 1 ) + ( 13 - 1 ) + (6 - 1) +( 10 - 1 ) )/ 6
    = ( 7 + 8 +10 + 13 + 6 + 10 ) / 6 - ( 6 x 1 ) / 6

    Correct Option: A

    Required average
    = (( 7 - 1 ) + ( 8 - 1 ) + ( 10 - 1 ) + ( 13 - 1 ) + (6 - 1) +( 10 - 1 ) )/ 6
    = ( 7 + 8 +10 + 13 + 6 + 10 ) / 6 - ( 6 x 1 ) / 6
    =9 - 1 = 8


  1. The average number of shirts with Salman, Ambani and Dalmiya is 60, if all of them reached a shopping mall in Delhi and purchased 6 shirts each of them then average number of shirt each of them now has









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    Required average
    = Old average + New average

    Correct Option: A

    Required average
    = Old average + New average
    = 60 + 6 = 66



  1. In a flower shop there were 6 flowers in each bouquet. If the seller has doubled the number of flowers in each bouquet then the new average of flowers in each bouque is









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    Now required average
    = old average x Multiplicand

    Correct Option: A

    Now required average
    = old average x Multiplicand
    = 6 x 2 = 12