Welcome to ixamBee
Continue with your mobile number
ATQ, Total sum of 8 consecutive odd numbers = 20 X 8 = 160 According to Arithmetic progression: Sum = n/2[2a+(n-1)×d] [where n = number of terms, 'a' = irst term and 'd' = common dierence] Or, 160 = 8/2[2a+(8-1)×2] Or, 40 = 2a + 7 × 2 Or, 26 = 2a So, 'a' = 13 Last number = a + (n - 1) × d = 13 + (8 - 1) × 2 = 27 Previous odd number to these numbers = 13 - 2 = 11 And, next odd number to these numbers = 27 + 2 = 29 So, required average = (160+11+29)/10 = 200 ÷ 10 = 20 Alternate Solution Since, the number that are included is equally more and less than sum of the given 8 numbers, therefore, there eect will cancel out and the average will remain sum.
5 girls can do a piece of work in 9 days, 4 boys can do the same piece of work in 8 days, 6 men do the same piece of work in 2 days and 4 women can do t...
The team of A B and C was supposed to complete a piece of work. Working alone, A could have completed the same work in 190 hours. B could have completed...
A team of 16 men works 9 hours a day and completes a task in 40 days. If the goal is to finish the same task in 30 days, with each man working 8 hours ...
A can complete a piece of work in 27 days. He worked for 21 days and then B finished the remaining work in 8 days. In how many days can A and B finish t...
4 girls working together for 1 day complete the same amount of work as 6 men working together for 1 day. The efficiency of 1 man ...
Initially, Rajat works at a speed where he can complete a task in 24 hours, but he maintains this speed for only 16 hours. After ...
8 children and 6 women together can complete a piece of work in 10 days and work done by a children in one day is one-third of the work done by a women ...
A can complete a certain work in 12 days, while B can complete it in 15 days. After working together for 4 days, A leaves and B continues working alone....
Three boys can do a work in 15 days where as 6 girls can do in 12days. What will be the time taken to complete the same work by a teacher if the efficie...
A and B together can do a piece of work in 30 days, B and C together can do it in 20 days. A starts the work and works on it for 5 days, then B takes it...
