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There are 1000 junior and 800 senior students in a class.And there are 60 sibling pairs where each pair has 1 junior and 1 senior. One student is chosen from senior and 1 from junior randomly.What is the probability that the two selected students are from a sibling pair?
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161?85?65?89 = 100, then use + or - in place of ? and take + as m,- as n then find value of m-n.?
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In a cycle race there are 5 persons named as J,K,L,M,N participated for 5 positions so that in how many number of ways can M finishes always before N?
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Rahul took a part in cycling game where 1/5 ahead of him and 5/6 behind him excluding him. Then total number of participants are
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If a refrigerator contains 12 cans such that 7 blue cans and 5 red cans. In how many ways can we remove 8 cans so that atleast 1 blue can and 1 red can remains in the refrigerator.
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There are 16 people, they divide into four groups, now from those four groups select a team of three members,such that no two members in the team should belong to same group.
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How many five digit numbers are there such that two left most digits are even and remaining are odd and digit 4 should not be repeated.
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7 people have to be selected from 12 men and 3 women, Such that no two women can come together. In how many ways we can select them?
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Tennis players take part in a tournament. Every player plays twice with each of his opponents. How many games are to be played?
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Find the unit digit of product of the prime number up to 50 .
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