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PRMO BOOTCAMP 2021-22
PRMO BOOTCAMP 2021-22
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Snehal
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The number of ways in which we can arrange 5 red balls, 5blue balls , 5 orange ballsand 5 green balls such that neitherred balls nor orange balls can appear in the first fivepositions,blue balls and green balls cannot appear in the next fivepositions againorange balls and red balls cannot appear in thenext five positions and green balls andblue balls cannotappear in the last five positions is k², find sum of digits of k.
QUESTION The number of ways in which we can arrange 5 red balls, 5blue balls , 5 orange ballsand 5 green balls such that neitherred balls nor orange balls can appear in the first fivepositions,blue balls and green balls cannot appear in the next fivepositions againorange balls and red balls cannot appear in thenext five positions and green balls andblue balls cannotappear in the
2022-01-25
If the bisector of two adjacent angles are perpendicular to one another, then prove that the adjacent angles are formed by two intersecting straight lines?
Let us assume that there are three intersecting lines.Angle /_EBD+/_FBD=90°or, 1/2(/_ABD+/_CBD)=90°or, /_ABD+/_CBD = 180°Therefore ABC is a straight line and AB and BC are collinear, therefore the adjacent angles are formed by the lines ABC and BD (only two lines)Hence proved.
2021-06-27
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