Question
The names of 4 students from section A, 6 students from
section B and 8 students from section C were selected. The age of all the 18 students was different. Again, one name was selected from them and it was found that it was of section B. What was the probability that it was the youngest student of the section B?Solution
The total number of students = 18 When 1 name was selected from 18 names, the probability that he was of section B = 6/18 = 1/3 But from the question, there are 6 students from the section B and the age of all 6 are different therefore, the probability of selecting one i.e. youngest student from 6 students will be 1/6
Given below an equation having four blanks you have to check from the alternatives which among the given is correct?
21 _ 51 _ 7 _ 12 _ 75
After interchanging the given two signs, what will be the value of the given equation?
X and –
64 + 15 ÷ 90 - 120 X 17
Select the correct combination of mathematical signs that can sequentially replace the “@” sign and balance the following equation.
16@5@4@2@...
If the ‘-’ and ‘×’ are interchanged, What will be the value of the following equation?
34 × 22 + 192 ÷ 12 – 8
...Which among the given operators should replace the “%” (in the same order) in the given expression below:
5 % 10 % 5 % 36 % 15 % 6
What will be the value of expression if the numbers/digits ‘(30)’ and ‘(13)’ are interchanged?
78 ÷ 30 × 6 + 13 - 14 + 12
...Select the correct combination of mathematical signs that can sequentially replace the sign * and make the equation correct.
3 * 12 * 4 * 5 * 4 * 116
Out of the total number of players, 100/3 % are in hotel X and the remaining are in hotel Y. If 20 players from hotel Y are shifted to hotel X, then the...
Which two signs need to be interchanged to make the following equation correct?
75 – 18 × 80 ÷ 16 + 40 = 125
Select the correct combination of the mathematical signs to replace the ‘@’ symbols in the below equation and thereby balance it:
81@9@5@30@1...
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