let m∈N and 0<x<m
if i = [(((m + 1)x)/(x + 1))]
prove that 2 ((m),(( i)) ) ≥ x^(m-i)
where [x] is integer part of x and ((m),(( i)) )
is a binomial coefficient
A 10 liter bottle filled with a 20% alcohol solution. How much 75% alcohol solution should be added to obtain 45% alcohol solution?
a) 1.62 lit b) 1.72 lit.
c) 1.82 lit d) 1.92 lit.