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zayzay162
zayzay162
29.10.2020 • 
Mathematics

In a school of 11th class there 10 boys and 10 girls are there many activities are followed by the student due to some problems two from them 1 boy and 1 girl are always absent in class many activities are going on: (i) in how many ways 3 prizes can distribute among them.
(ii) in how many ways can they shake hands.
(iii) in how many ways they can stand in a row.
(iv) in how many ways they can sit so that all girls sit together

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