Question
Consider two independent random variables: X~N(5, 4) and
Y~N(3, 2). If  (2X + 3Y)~N(μ, σ2), then the values of mean (μ) and variance (σ2) are a) μ = 19 and σ2=34 b) μ = 8 and σ2= 14 c) μ = 19 and σ2=14 d) μ = 8 and σ2=34Solution
7    8     ?     13     17     22    28
...4, 9, 24, 69, ?, 609
196, 196, 203, 229, 292, ?
What will come in place of the question mark (?) in the following series?
4, 36, 31, 279, 275, 2475, ?
Choose the missing term.
3F, 6G, 11I, 18L,?
216, 81, 297, 378, ?, 1035, 1728
16.12 × 15.94 + 654.92 – 344.83 = ?× 5.95
What will come in place of the question mark (?) in the following series?
10, 410, ?, 710, 760, 785
What value should come in the place of (?) in the following number series?
300, ?, 360, 420, 500, 600
What value should come in the place of (?) in the following number series?
15, 16, 24, 51, 115, ?