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Ten different balls are distributed into 4 distinct boxes such that a specified box contains 2 balls.. Find no of such distribution

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anand was asked to draw a measure of angle 45 degrees but he drew 45 degrees 27". what is his percentage of error?

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Find the number of zeroes in the following product
(1^20)(2^20)(3^20)(4^20)........(38^20)

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If sin8
θ + cos8
θ - 1 = 0, then what is the value of cos2
θ sin2
θ (If θ ≠ 0 or π/2)?

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