There are total 10 balls in a jar , 8 of them are unique and 9th and

There are total 10 balls in a jar , 8 of them are unique and 9th and 10th ball both have same color. In how many ways can we pick 5 balls from the jar if same color balls are not allowed in the 5 balls set? a. 170 b. 196 c. 182 d. 252 e. 186 can someone explain this problem ? (…)