Q 2461667525.     Examine the following statements regarding a set of
balls

I. All balls are black
2. All balls are white
3. Only some balls are black
4. No balls are black

Assuming that the balls can only be black or white,
which two of the statements given above can both be
true, but cannot both be false? Choose the correct
answer from the codes given below:

IAS 1997 Prelims
A

1 and 4

B

1 and 3

C

2 and 3

D

2 and 4

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