a study group consists of 4 english majors , 6 biological sciences majors , and 5 engineers . in how many ways can 3 english majors , 3 biological science majors and 3 engineers selected from the given group ?
the number of ways of selecting three english majors , two biological science majors and three engineers is : = ⁴ c ₃ * ⁶ c ₂ * ⁵ c ₃ = ( 4 * 3 * 2 ) / ( 3 * 2 * 1 ) * ( 6 * 5 ) / ( 3 * 2 * 1 ) * ( 5 * 4 * 3 ) / ( 3 * 2 * 1 ) = 4 * 5 * 10 = 200 ways . answer : d
multiply(divide(factorial(6), multiply(factorial(3), factorial(3))), divide(factorial(5), multiply(const_2, factorial(3))))