Which of the following pair of element – atomicity is correct?
I. Helium – monoatomic
II. Oxygen – triatomic
Helium (He) is an inert gas. Inert gases exist as a monoatomic. Triatomic oxygen (ozone, O3) is a very reactive allotrope of oxygen that is a pale blue gas at standard temperature and pressure
There are 10 members in a delegation which is to be sent at SAARC summit. The total number of members is 18. In how many ways can the selection be made ...
In a group of 9 boys and 5 girls, 5 students have to be selected. In how many ways it can be done so that only 2 boys are included.
Akshay has 7 relatives, 3 males and 4 females. His wife twinkle also have 7 relatives, 3 females and 4 males. In how many ways can they invite 3 male an...
8 students appear in an examination. In how many ways can the result be announced?
In how many different ways can the letter of the word ‘STRONG’ be arranged?
How many ways can 8 women and 8 men be seated around a circular table where no two women can sit together?
In how many different ways can the letters of the word ‘PADDLED’ be arranged?
In how many different ways can the letter of the word CHESTNUT is arranged so that vowels always occur together?
How many digits are required to number a book containing 300 pages?
Among a set of 6 black balls and 3 white balls, how many selections of 5 balls can be made such that at least 3 of them are black balls?
