UPSC Prelims · 1990 · GS Paper I · Q88
Ina wooden box there are 3 red and 4 black balls. If two balls are taken outSimultaneously (without looking at them), then the probability of both the balls being red is
- (A)Zero
- (B)1/7
- (C)2/7
- (D)3/7
The answer key for this question is not in the bank yet.
- Subject
- History