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Physics

Multiple Choice Question with Two or More Choices Correct
When a wave is refracted into another medium, which of the following will change?

(a)	Amplitude	(b)	Velocity
(c)	Frequency	(d)	Phase

Chemistry

True or False :
Stronger acids have lesser values of pK_a as compared to weaker acids.

Mathematics

If the mean and variance of a binomial variate X are 2 and 1 respectively, then the probability that X takes a value greater than one is equal to ............ .

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