Advertisements
Advertisements
Question
Suppose, you have two shorts, one is black and the other one is blue; three shirts which are in white, blue and red. You again wish to make different combinations, but you always want to make sure that the shorts and shirt that you wear are of different colours. List and check how many combinations are possible now
Advertisements
Solution
We have given two shorts which are black and blue in colour.
Take it as T black and T blue.
Also, we have 3 shirts, coloured white, blue and red denoted by S white, S blue and S red.
Now fix T black and then T blue the different combinations are 
Thus we get a total of 6 combinations as
Black short and White shirt
Black short and Blue shirt
Black short and Red shirt
Blue short and White shirt
Blue short and Blue shirt
Blue short and Red shirt.
But it is given short and the shirt is of different colours.
We give up Blue short and Blue shirt combination.
So we have 5 different combinations.
APPEARS IN
RELATED QUESTIONS
You have two red and two blue blocks. How many different towers can you build that are four blocks high using these blocks? List all the possibilities
Fill in the boxes 1, 2 and 3
Fill in the boxes 1, 2 and 3
Fill in the boxes 1, 2 and 3
Complete the following 4 × 4 Sudoku by using the numbers 1, 2, 3, 4
Can you find the mistake? Explain
ABC, ACB, BCA, BAA, CAB, CBA
The following information shows the grades of science and maths of 30 students of class 5.
Answer the following question.
a. How many students got equal grades in both subjects.
b. How many students got a higher grade in science than in maths?
c. Which was the most common grade in science?
Write all possible three digit numbers that can be formed without repeating these numbers? how many numbers can be formed?
You have to choose a tiffin and a drink from the given menu of a hotel. List the possible combinations. How many combinations are possible?
| Tiffin | Drink |
| Idly | Tea |
| Poori | Coffee |
| Dosai | Milk |
| Pongal |
There are 6 sprinters A1 A2 A3 A4 A5 A6 (an athlete who runs fast in short race). List out the possible combinations that they win the 3 medals gold, silver and bronze
