Question
In an election, a voter may vote for any number of
candidates not greater than the number to be chosen. There are 8 candidates and 5 members are to be chosen. In how many way can a person vote?Solution
A voter may cast vote for either 1 candidate or 2 candidates or 3 candidates or 4 candidates or 5 candidates out of 8. The voter may cast vote for 1 candidate in 8C1 ways = 8 The voter may cast vote for 2 candidate in 8C2 ways = 28 The voter may cast vote for 3 candidate in 8C3 ways = 56 The voter may cast vote for 4 candidate in 8C4 ways = 70 The voter may cast vote for 5 candidate in 8C5 ways = 56 Total ways = 218
By interchanging the given two signs and numbers which of the following equation will be correct?
× and ÷, 7 and 9
The ratio of the income and savings of John is 5:2, respectively. If his expenditure increases by an amount which is equal to half of his initial saving...
- A merchant made a profit of Rs. 600 on selling a gadget. Had the cost price been Rs. 400 lower and the selling price Rs. 900 more, the profit would have be...
Which of the following city G goes?
Four of the following five are alike in a certain way and hence form a group. Find the one who doesn’t belong to that group.
- ‘P’, ‘Q’ and ‘R’ divide a certain amount among themselves. The average of their shares is Rs. 4860. Share of ‘P’ is 12(1/2)% more than shar...
If all the digits of the number 789615432 are arranged in decreasing order, then sum of 5 th and 6 th digits (from the left end) of the number thus form...
In a certain code language, ‘accounts receipt expenditure’ is coded as ‘ef ws bn’, ‘rules receipt framed’ is coded as ‘pl ef yu’, and �...
- What is the area of the sector of a circle of radius 10 cm and formed by an arc of length 15 cm?
If all the prime digits of the number 6493858573 are written first (in increasing order) followed by even digits(in increasing order) and then odd digit...
Relevant for Exams:
