In a purse, there are 3 two-rupee coins and 4 five-rupee coins. If you randomly select 4 coins from the purse, what is the probability that you will choose 3 five-rupee coins and 1 two-rupee coin?
ATQ, Number of ways of selecting 3 coins from purse = 7C4 = {[7!/(4!×(7-4!))]} = {7!/(3!×4!)} = {(7×6×5)/(1×2×3)} = 35 Number of ways of selecting 3 five-rupees coins and 1 two-rupees coins = 4C3 × 3C1 = [(4!/(3!×1!)) × (3!/2!×1!)] = 4 × 3 = 12 Required probability =(12/35)
Select the word , which means the same as the group of word given –
A gigantic statue
A new word coined by an author.
In each question below, word is used in four different ways. Choose the option in which the usage of the word is INCORRECT or INAPPROPRIATE.
...
A post with little work but high salary.
Select the option that can be used as a one-word substitute for the given group of words.
Having no boundaries or limits
In the following question, four words have been given out of which one word is incorrectly spelt. Select the incorrectly spelt word.
Entail
A. Child obesity has become an increasingly serious problem inevitably entailing serious health hazards.
B. Jackson's versio...
In each of the following questions, a word has been given and used in three statements. You are supposed to identify which of the statement/s use/s the ...
Select the most appropriate 'one word' for the expression given below.
A place where clothes are kept.
Ambiguity
(1) Japanese gardens typically included a building for scholarly ambiguity and meditation.
(II) Little ...
