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Electricity - 3 |Class - 10th Physics| Science Chapter 12| CBSE NCERT | Rajesh Suthar Sir

In the 10^(th) grade of Brooklyn Public School, the ratio of the number of boys to the number of girls was 3: 5 . Among the students , some had taken up literature as a specialzation while the rest had taken up science. The ratio of the number of literature students to science students was 5: 7 . If it is known that one - thrid the number of boys had taken up science as a specialization , what fraction of the girls had literature as their specialization ?

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In Young.s double slit experiment, the 10th bright fringe is at a distance x from the central fringe. Then a) the 10th dark fringe ia at a distance of 19x"/"20 from the central fringe b) the 10th dark fringe is at a distance of 21x"/"20 from the central fringe. c) the 5th dark fringe is at a distance of x"/"2 from the central fringe. d) the 5th dark fringe is at a distance of 9x"/"20 from the central fringe.

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