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- The number of ways of choosing r objects from n objects is called the number of ___________ of n objects taken r at a time and is given by the formula C(n, r) = ___________.arrow_forward(a) write nnnnnnin exponential form (b) write 35in expanded form and then simplify.arrow_forwardThe number of ways of arranging r objects form n objects in order is called the number of ______________ of n objects taken r at a time and is given by the formula P(n,r)=__________________.arrow_forward
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