Question
An instructor has a question bank consisting of 200 easy
True / False questions, 300 difficult True / False questions, 400 easy multiple-choice questions and 500 difficult multiple-choice questions. If a question is selected at random from the question bank, what is the probability that it will be an easy question given that it is a multiple-choice question?Solution
Let us denote E = easy questions, M = multiple choice question, D = difficult questions and T = true/false questions. Total number of questions = 1400 Total number of multiple-choice questions = 900 Probability of selecting easy multiple-choice question is P ( E ∩ M) = 400/1400 = 2/7 Probability of selecting multiple is P ( M) = 900/1400 = 9/14 P(E|M) represents the probability that a randomly selected question will be an easy question, given that is a multiple-choice question. Therefore, P(E|M) = P( E ∩ M)/P(M) = (2/7)/(9/14) = 4/9 Therefore, required probability = 4/9
Select the option in which the given figure is embedded (rotation is NOT allowed).
Which is the one that does not belong to the group?
Based on the given statement, two conclusions are drawn. Find out which conclusion is true based on the statement.
Statement: Z > R ≥ Y > P = ...
If FHNPKMEG means GOLF, then what does RTSUHJBDJL stand for?
Select the figure that will come in place of the question mark (?) in the following figure series.
Rearrange the following jumbled sentences to make a meaningful one:
P: are inhibiting progress
Q: they look for creative
R: ...
In a certain code language, 'DOSIER' is written as 'DEIORS' and 'LOGIC' is written as 'CGILO'. How will 'CORTEX' be written in that language?
Three of the following four letter-clusters are alike in a certain way and one is different.
Pick the odd one out.
A question is given followed by two arguments. Decide which of the arguments is/are strong with respect to the question
Question:
Is boa...
Statements:
All plants are vegetables.
Some plants are poisonous.
Conclusions:
I. All vegetables are poisonous.
I...