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All posts related to Average

Valerie Montoya
Shared from ACT Mock Test - 1 ( Mathematics) on Oct 27, 2018 8:51 AM

The average of 40 numbers is 35. If two numbers (25 and 45) are not included, what will be the average of the remaining numbers?

 
37.5
37
36
35
34
Please type your answer before submitting.

Were did 38 come from

Krishna A
Shared from IBPS PO (Prelims) Mock - 27 on Aug 30, 2016 3:56 PM

Half of a certain journey is covered at the rate of 35 km/h, one-fourth at the rate of 40 km/h and the rest at the rate of 45 km/h. Find the average speed for the whole journey.

 
38.33 km/h
36.30 km/h
36.33 km/h
30.33 km/h
None of these
Please type your answer before submitting.

Any shortcut ???

Mayank Kumar
Shared from Arithmetic (Bank PO/Clerical) on Aug 24, 2015 1:00 AM

Raju scored 45, 55, 65, 80 and 90 marks. Find his average.

 
65
77
63
67
70
Please type your answer before submitting.

67 is the correct answer

Chandan Sharma
Shared from IBPS PO (Prelims) Mock - 1 on Jul 16, 2015 3:37 PM

The average of two numbers increases by 20 when one of the numbers is doubled and it increases by 25 when the other number is doubled. What is the average of both numbers?

 
40
45
50
Cannot be determined
None of these
Please type your answer before submitting.

Let (x+y)/2 = z {"original average of two numbers"} ----- eqn-1

according to first condition (2x+y)/2 = z+20 ------- eqn-2

then according to second condition (x+2y)/2 = z+25 -----eqn-3

solve both eqn 2 & 3 and you will find x+y = (4z/3)+30

arrange the result as eqn-1 to find original average of two numbers
(x+y)/2 = (2z/3)+15 ----- eqn-4

compare eqn-1 & 4 i.e
z = (2z/3)+15

by solving it, the result will be 45.

Pravin Kadu
Shared from Mock - 13 IBPS PO (Mains) on Oct 04, 2014 6:04 PM

The difference between the average of three consecutive even numbers and the average of the next two consecutive even numbers is 5. What is the first even number?

 
10
12
14
Cannot be determined
None of these
Please type your answer before submitting.

Because one cannot solve this question without looking at the options.