To the right of the address bar, tap More icon to Bookmark this Page.
Touch and hold the Favorites button at the bottom and Select Add Bookmark from the menu.
Share with your friends and help them crack UPSC!
Or Share on
The following questions are accompanied by two statements (i), (ii) and (iii). You have to determine which statement(s) is/are necessary/sufficient to answer the question.
A bag contains three types of balls, Red, Blue, Black. Find the number of balls of black color. (I) Number of blue balls are 40% of the total balls. (II) Probability of getting one red ball and one blue ball is ¼ and ⅖ respectively. (III) If one green ball adds in the bag then probability of getting black ball become ⅓.
(I) and (II) together
Only (III) or (I) and (II) together
Only (I) or Only (III)
Both (II) and (III) together
Answer cannot be found even using all statements.
Correct Option is Both (II) and (III) together
Get access to all of our verified questions
An Offering from
uFaber Edutech Pvt. Ltd.
No. 1 Private training for UPSC Prepartions
Office No 311, Kohinoor Commercial 1 Opposite Don Bosco High School Kurla West, Mumbai, Maharashtra 400070