1. 4
2. 5
3. 16/3
4. 16/5
5. none of these
16/3
1. either p is a prime or q is a prime
2. if p, q is a prime then r is also a prime
3. p, qandr can never be primes.
4. I and II
5. II and III
if p, q is a prime then r is also a prime
1. 8
2. 12
3. 16
4. 24
5. 6
24
1. 0
2. 1
3. 2
4. 4
5. none of these
1
1. 1
2. 3
3. 5
4. 6
5. 2
2
1. 0
2. 1
3. 2
4. 3
5. none of these
2
1. cannot be formed
2. can be formed in exactly two ways
3. can be formed in exactly one way
4. none of these
can be formed in exactly one way
1. She can have 4 ages
2. She can have 2 ages
3. given that all primes are distinct she can have only one age
4. a and c
5. b and c
b and c
1. 5/7
2. 3/7
3. 3/5
4. 1/3
3/7
1. 1/63
2. 2/35
3. 2/63
4. 9/14
2/63