Question
Two hats are picked at random, what is the probability
that one is blue and one is yellow? A box contains 6 red, 4 blue, 2 green and 4 yellow hats.Solution
Total number of hats = 6 + 4 + 2 + 4 = 16 Let S be the sample space. Then, n(S) = number of ways of drawing 2 hats out of 16 = ¹⁶C_2 = (16 × 15 )/( 2 × 1) = 120 Let E= event of drawing two hats so that one is blue and one is yellow. n(E) = ⁴C_1×⁴C_1= 4 × 4= 16 ∴ P (E) = (n(E))/(n(S)) = 16/120 = 2/15
Select the figure from the given options, which when put in place of the question mark (?) will logically complete the series.
A piece of paper is folded and punched as shown below. From the given responses indicate how it will appear when opened.
In a certain code language, 'EAGER' is writtenas ‘CGGTG’ and 'LEARN' is writtenas ‘GNAPT’. How will 'HINDI' be written in that language?
...Select the correct mirror image of the given figure when the mirror is placed at MN as shown below.
Arrange the following words in the order in which they appear in an English dictionary.
1. Pleats
2. Pottery
3. Platter
4....
Four of the following five are alike in a certain way and so form a group. Which is the one that does not belong to that group?
U, N, L, J, K
Insert arithmetical signs in the equation for it to be correct
8 ? 4 ? 2 = 16
Complete the series by replacing the question mark (?).
Q331T, U442X, Y553A, ?
What should come in place of '?' in the given series?
77 754 ? 75224 752224 7522224 75222224
Statement:
A. All germanium is lithium.
B. Some deuteron are plumbum.
C. Some germanium is chlorine.
Conclusion:
(I) ...
