Maths-
General
Easy

Question

In how many ways can 30 different pearls be arranged to form a necklace ?

  1. 29!/2  
  2. 29!  
  3. 29! 2!  
  4. None of these  

The correct answer is: 29!/2

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A double-decker bus has 5 empty seats in the upstair and 5 empty seats in the downstair. 10 people board the bus of which 2 are old people and 3 are children. The children refuse to take seats downstair while old people insist to stay downstair. In how many different arrangements can be 10 people take their seats in the bus?

A double-decker bus has 5 empty seats in the upstair and 5 empty seats in the downstair. 10 people board the bus of which 2 are old people and 3 are children. The children refuse to take seats downstair while old people insist to stay downstair. In how many different arrangements can be 10 people take their seats in the bus?

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A library has a copies of one book, b copies of each of two books, c copies of each of three books, and single copies of d books. The total number of ways in which these books can be distributed is-

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Five persons including one lady are to deliver lectures to an audience. The organiser can arrange the presentation of their lectures, so that the lady is always in the middle, is-

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A party is arranged of 18 persons who sit along two sides of a long table with 9 chairs on each side. Four men wish to sit on one particular side and three on the other particular side. In how many ways can they be seated -

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The age of fossils or dating of fossils can be best estimated by

The age of fossils or dating of fossils can be best estimated by

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Natural selection can lead to …A… in which more individuals acquire mean character value, …B…. more in which individuals acquire value other than the mean character value and …C… in which more individuals acquire peripheral character value at both ends of the distribution curve
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Choose the correct options for A,B and C to complete the given statement with reference to NCERT text book

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All the existing life forms share …A… and share …B… ancestors. The geological history of earth closely correlates with …C… history of earth.
Choose the right option for A,B and C to complete the given statement with reference to NCERT text book

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Choose the right option for A,B and C to complete the given statement with reference to NCERT text book

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