(Q). How many different sums can be formed with the following coins:⟶ one 1 ruupee, one 50 paise, one 25 paise, one 10 paise & one 5 paise coins? Solution:- Method (1).Every coin has 2 ways of selection:⟶ either selected or not...
(Q). At an election three wards of a town are canvassed by 6, 7 & 10 men repectively. If there are 30 volunteers, in how many ways can they be allotted to different wards?Solution:- 1st we will select 6 out of 30 in ³⁰C₆ ways then next 7 out of 24 in ²⁴C₇ ways...
(Q). In how many ways 5 vowels & 6 consonants can be selected from 26 letters of alphabet?Solution:- vowels = a, e, i, o, u ⟹ total 5∴ 5 vowels can be selected only 1 way& 6 consonants can be selected from 21 consonants in ²¹C₆ waysHence total number of ways =...
(Q). Find the number of ways of selecting 11 players from a group of 35 iplayers such that the oldest & the youngest players are always included in the group.Solution:- Since the oldest & the youngest players i.e. 2 particular players are always included in...
(Q). In how many ways 5 players can be selected out of 10 players(i). If Ankit & Rahul are always selected(ii). If Ankit & Rahul are always rejected.Solution:- (i). ⁸C₃ ways(ii). ⁸C₅ ways ...
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