Question
If four hats are picked at random, what is the
probability that one is green, two are blue and one is red? 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 4 hats out of 16 = ¹⁶C_4 = (16 × 15× 14 × 13 )/( 4 × 3 × 2 × 1) = 1820 Let E= event of drawing 4 hats so that one is green, two are blue and one is red = n(E) = ²C_1×⁴C_2×⁶C_1= 2 × 6 × 6= 72 ∴ P (E) = (n(E))/(n(S))= 72/1820 = 18/455
Select the word which can be formed using the letters of the given word. (Using the letters only once)
EXAMINATION
Find which one of the given words cannot be made from the letters of the given word ‘ DRAINAGE ’.
Find which one of the given words cannot be formed from the letters of the given word.
‘ STAGGERING ’
...Select the letter-cluster from among the given option that can replace the question mark (?) in the following series.
K, S, Z, F, K, O, ?
Find which one of the given words cannot be made from the letters of the given word.
‘ REIMBURSEMENT ’
...Select the word which cannot be formed using the letters of the given word (using each letter only once).
ENVIRONMENTALIST
If it is possible to make a four letter meaningful word from 4th, 5th, 7th and 8th letters of the word ‘ R...
Which of the following words CANNOT be formed using the letters of the given word only once?
TRADITIONAL
Find which one of the given words cannot be made from the letters of the given word.
‘ PUNISHMENT’
...From the given alternatives select the word which cannot be formed using the letters of the given word
SECULARIZATION
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