Skip to main content

Aptitude Day 123

Problems on Permutations and Combinations:

 1. In how many ways can a group of 4 men and 3 women be made out of a total 6 men and 5 women?

 Solution:
               =  6C4 *  5C3
               =   6C2 *  5C2
               =  (6*5)/(1*2) * (5*4)/(1*2)
               = 150.

2. In how many ways a committee, consisting of 2 men and 4 women can be made from 5 men and 5 women?

 Solution:
               =  5C2 *  5C4
               =  5C2 *  5C1
               =  (5*4)/(1*2) * 5
               =  50.

Comments

Post a Comment

Popular posts from this blog

Aptitude Day 332

Answers of Day 331: 1. 450%.                                     2. 10.   Problems on Percentage: 1. 0.001 is what percent of 0.01? Solution:                   0.001/0.01 * 100 = 1/10* 100                                               = 10%. 2. A fruit seller had some apples. He sells 20% apples and still has 500 apples. Originally, he had: Solution:                (100-20)% of x = 500                80/100*x = 500                x = 625.
Post a Comment
Read more

Vocabulary Day 21

Stammer Thesaurus: Verb : stutter in speech, speak haltingly, speech defect           halt, hesitate, pause, stop, sputter... Antonyms : say quickly, pronounce, enunciate... Example sentences: ·          He was stammering when the teacher caught him red-handed. ·          One should avoid the stammering while delivering a speech. 
Post a Comment
Read more