by shivamtripathi22 | Oct 18, 2024 | Uncategorized
(Q1). 15 litres of a mixture of milk and water in the ratio 2:1, the amount of milk added to the mixture so as to have milk and water in the ratio 5:2 ?...
by shivamtripathi22 | Oct 18, 2024 | Concept, alligation, mixture, quatitative aptitue
page 3 When a≠0,there are two solutions to ax2 + bx + c = 0and they are x = − b ± b2 − 4ac 2a . 1 2...
by shivamtripathi22 | Oct 18, 2024 | alligation, mixture, quatitative aptitue
⬤ Mixture are generally of two types. When different ingredients are mixed together then it is known as Simple Mixture. e.g. a mixture of water and milk; water and pure spirit. ⬤ When two or more Simple mixtures (made of same ingredients of same or different...
by shivamtripathi22 | Feb 4, 2024 | Uncategorized
(Q). In how many ways 30 identical chocolates be distributed among 5 students such that each student receive at least 1 chocolate ? Sol:- identical chocolate ━ distinct...
by shivamtripathi22 | Feb 4, 2024 | Uncategorized
(Q). In how many ways 30 identical chocolates be distributed among 5 students ? Sol:- identical object ━ distinct...
by shivamtripathi22 | Feb 4, 2024 | Uncategorized
1. In how many ways 30 identical chocolates be distributed among 5 students ? 2. In how many ways 30 students can be send to 5 class rooms ? 3. In how many ways 20 different article can be distributed equally among 4 persons ? 4. In how many ways 30 identical...
by shivamtripathi22 | Jan 31, 2024 | Uncategorized
(Q). In how many ways 15 students can be arranged in a row such that A is always ahead of B ? Sol:- Without any condition 15 students can be arranged in 15! ways. In these arrangements in 50% cases A will be ahead of B and in remaining 50% cases B will be ahead of A....
by shivamtripathi22 | Jan 31, 2024 | Uncategorized
(Q). In how many ways batting order of 11 players can be made out of 15 players if Rohit is always selected ? Sol:- Since Rohit is always selected so we are to select 10 players out of remaining 14 players which can be done in ¹⁴C₁₀ ways. Now these 11 players can be...
by shivamtripathi22 | Jan 30, 2024 | Uncategorized
(Q). In how many ways 5 distinct volumes of chemistry & 7 distinct volume of botany books can be arranged on a bookshelf such that no two botany books are together ?Sol:- •C₁•C₂•C₃•C₄•C₅•From above figure we have 6 places (marked by •) to place 7 botany books.So...
