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Maths Permutations & Combination Mix Single Correct MCQ
Published on: August 13, 2026

10 equi spaced horizontal lines are intersected by 12 equi spaced vertical lines. If the distance between two successive horizontal lines is same as that between two successive vertical lines the number of squares formed by the lines is -

A
365
B
385
C
375
D
395

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Text Solution

Verified by Experts
The correct answer is:
C

Total number of ways =

m = 10, n = 12

= 9.11 + 8.10 + 7.9 + 6.8 + 5.7 + 4.6 + 3.5 + 2.4 + 1.3

= 99 + 80 + 63 + 48 +35 + 24 + 15 + 8 + 3

= 375.

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