Question
A is 75% more than B. C is 60 less than A. Average of
A, B and C is 340. The ratio of B and C is 2:x. Find the value of x.Solution
Let A be 7a and B be 4a. And C = 7a – 60 According to question, => 7a + 4a + 7a – 60 = 340 x 3 => 18a = 1080 => a = 60 So, B = 4a = 240 And C = 7a – 60 = 360 Now, B /C = 2/x => 240/360 = 2/x => x = 3
At a round table, n persons are seated on n chairs. The probability that two friends from same college are sitting next to each other, is:
The deseasonalised time - series data will have only trend (T), cyclical (C) and irregular (I) components and is expressed as:
The grouped data for the observation are as follows.
Class :Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 2-4Â Â Â Â Â Â Â Â 4-6Â Â Â Â Â Â Â Â Â 6-8<...
These seventh decile (D7) of data set 4, 3, 10, 9, 1 is
The coefficient of correlation is the _________ of coefficients of regression.
Five persons A, B, C, D and E occupy seats in a row at random. The probability that A and B sit next to each other is:
Which option is WRONG?
Which option is incorrect for the component of ti.me series.
