Silverband resistors are correct to +-10%.If the probability that such a resistor of nominal value of 100 ohms in the acceptable range of 100+-2 ohms is 0.6 what is the probability that of three purchased:

1. The first two are within this range

2. The first two are within this range and the third outside it

3. Any two are within the range irrespective of the other one

4.Any two are within the range and the other outside it?