Home › TS EAPCET (Engineering) › Mathematics › Binomial Coefficients › How many 5-bit words made of 0s and 1s contain e…
How many 5-bit words made of 0s and 1s contain exactly two 1s?
A20
B5
C8
D10
Answer & Solution
Correct answer: D. 10
Choosing which 2 of the 5 positions hold 1s gives 5 choose 2 = 10.
Related questions
A pizza shop offers 9 toppings. How many ways can a customer pick 3 different toppings?How many 4-element subsets does the set {1, 2, ..., 8} have?In the multiplicative formula, what does the denominator k factorial correct for?In (1 + x) to the power n, the coefficient of which term is n choose k?If k is greater than n, how is the binomial coefficient commonly defined?In row 6, what is the sum of the three middle entries?The sum of squares of row n equals the middle entry of which row?What is 1 + 25 + 100 + 100 + 25 + 1, the sum of squares of row 5 entries?