engineering recuitment NIC NIELIT Scientist B 2023 Mock Test Quantitative Aptitude Permutation and Combination
An optical store gives ten different types of frames and seven different glasses to be fitted in the frames. Two siblings- Jaya and Chavi went to the store. They want to buy one pair of specks each which consist of one frame and one glasses. Find the total number of ways in which they can buy two different pair of specks having nothing in common.
1
3750
2
3580
3
3470
4
3780