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1.no of words of 4 letters that can b formed with the letter of the word IITJEE. 2. 4 points out of 8 points are collinear, thn no. of quadilaterals cn b formed by thm?
1-78 make diff. cases
1-78
make diff. cases
Qno1 iitjee has six letters hence each of the four letters can be in 6! ways hence no of words formed is 4*6! words Qno2 no of quadrilaterals formed from 8 points is 8c4 4 of which are collinear no quadrilaterals are formed hence no of quad formed is 8c4-4c4
Qno1
iitjee has six letters hence each of the four letters can be in 6! ways
hence no of words formed is 4*6! words
Qno2
no of quadrilaterals formed from 8 points is 8c4
4 of which are collinear no quadrilaterals are formed
hence no of quad formed is 8c4-4c4
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