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Maths-

General

Easy

Question

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-

5P5 ways
4.4P4 ways
4 ! ways
5C4 ways

The correct answer is: 4 ! ways

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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 -

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 -

There are 12 balls numbered from 1 to 12. The number of ways in which they can be used to fill 8 places in a row so that the balls are with numbers in ascending or descending order is equal to-

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Wings of insects and birds are

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

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First life on the earth originated from non-living matters has been explained by

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

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$A u s t r a l o p i t h e c u s$ existed in

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Amoug the human ancestors, the brain size was more than 1000 cc in

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