6 The probability that New Year's Day is on a Saturday in a randomly chosen year is \(\frac { 1 } { 7 }\).
- 15 years are chosen randomly. Find the probability that at least 3 of these years have New Year's Day on a Saturday.
- 56 years are chosen randomly. Use a suitable approximation to find the probability that more than 7 of these years have New Year's Day on a Saturday.