Question
Two random variables x and y have the following
regression equations - 3x + 2y – 26 = 0 6x + y – 31 = 0 then, the mean values of x and y are respectively:Solution
3x + 2y – 26 = 0 6x + y – 31 = 0 The means of X and Y will satisfy the above two equations. So, solving the above two equations we get, Xbar = 4 Ybar = 7
- How many 6s are there in the following number series, which are preceded by 4 and followed by 9?
2 4 6 9 4 3 9 6 4 8 7 3 9 6 4 2 4 6 9 7 4 6 7 4 Select the related word/letters/number from the given alternatives.
Boat : Stream : : ?  : Track
Select the option that is related to third letter cluster in the same way as the second letter cluster is related to the first letter cluster.
PR...
Four number-pairs are given, out of which three are alike in a certain manner and one is different. Choose the different number pair.
Select the option that is related to the third number in the same way as the second number is related to the first number.
63: 5103 :: ? : 9802.
How many letters are there in the given series which are immediately followed by a number?
N 8 9 B @ A 7 % 8 N P @ P R N 9 @ B # 7 H 8
Select the option in which the numbers are not related in the same way as are the number of the following set.
(34, 40, 52)
Select the option in which the numbers are related in the same way as are the numbers in the given set.
(6, 19, 79)
Select the combination of numbers that when placed sequentially in the blanks of the given series will complete the series.
6 _ 2 3 _ 1 _ _ 8 ...
If 5459 = 450, 2485 = 160 and 8763 = 504, then 3474 = __.Â
