If four hats are picked at random, what is the probability that one is green, two are blue and one is red?
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
The following question contains three statements, one or more of which may not be grammatically correct. You are required to identify the incorrect sta...
In the following sentence, four words or phrases have been highlighted. One of them is incorrect. Choose the INCORRECT word or phrase from the given opt...
The state reeling for an agrarian crisis following famers’ agitation has approved a subsidy on electricity tariff to farmers.
Select the most appropriate option to substitute the highlighted segment in the given sentence. If there is no need to substitute it, select ‘No subs...
Benchmarks and regulatory mechanisms needing development and implemented for quality assurance in both government and private schools.
...A goldsmith with no formal architectural training, went i n to triple-handedly create a brilliant and risky octagonal structure that became the essent...
Select the correct passive/active form of the given sentence.
The scheme permits the students to buy the books from market.
Given below are sentences with an error in each. The error is in one part of the sentence. Below each sentence are given the options containing the pa...
Mostly of us would have at least one outfit in our wardrobe that we don’t use.
...The vastly display in precious objects reflects the family’s appauling lifestyle .
