2 votes 2 votes The average of five consecutive number is X. If the next three numbers are also included, determine the increase in the average of eight numbers. A) X B) X/2 C) X + 1.5 D) 2 Sangay asked Aug 1, 2018 Sangay 562 views answer comment Share Follow See 1 comment See all 1 1 comment reply Rishav Kumar Singh commented Aug 1, 2018 reply Follow Share (8x +12)/8 = x + 1.5 this is average of 8 consecutive numbers BUT increase in Avg. should be ((x - 1.5) - x) = 1.5 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes Option c is right abhishekmehta4u answered Aug 1, 2018 abhishekmehta4u comment Share Follow See all 6 Comments See all 6 6 Comments reply Show 3 previous comments Sangay commented Aug 2, 2018 reply Follow Share why is it start from x-2? Is there any reason? 1 votes 1 votes aambazinga commented Aug 2, 2018 reply Follow Share @Sangay No reason. Just to simplify calculation. You can start from any term of your choice. Answer would be invariant. 0 votes 0 votes abhishekmehta4u commented Aug 2, 2018 reply Follow Share Calculation become easy . We can take any number 0 votes 0 votes Please log in or register to add a comment.
0 votes 0 votes Let the numbers be a,a+1,a+2,a+3,a+4 . Hence avg = total / 5 = (5a+10)/ 5 = a+2 = X( as per question) Including the next 3 numbers a+5, a+6 , a+7 the total becomes 8a+28 . Avg of 8 nos = (8a+28)/ 8 = a+3.5 a+3.5 = (a+2)+1.5 = X+ 1.5 Sayan Bose answered Aug 1, 2018 Sayan Bose comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes c) X + 1.5 U can solve this problem by considering these consecutive numbers as 1 to 5 and then 1 to 8. imnitish answered Aug 1, 2018 imnitish comment Share Follow See all 0 reply Please log in or register to add a comment.
