PROBABILITY MATHS HOMEWORK (10 points for best answer!!!!)?

I missed the lesson yesterday and the homework is due tomorrow morning. Please can someone give me the answers! We will go over them all in class tomorrow so I will understand them but for now I REALLY need the answers with working out and I will appreciate it so much and give 10 points to the best answer :D 1.... show more I missed the lesson yesterday and the homework is due tomorrow morning. Please can someone give me the answers! We will go over them all in class tomorrow so I will understand them but for now I REALLY need the answers with working out and I will appreciate it so much and give 10 points to the best answer :D

1. A fair, 6-sided dice has faces numbered 1,2,3,4,5 and 6.
When the dice is thrown, the number facing up is the score.
The dice is thrown three times.
a) Calculate the probability that the total score is 18.
b) Calculate the probability that the score on the third throw is exactly double the total of the scores on the first two throws.

2. Younis spins a biased coin twice.
The probability that it will come down heads both times is 0.36.
Calculate the probability that is will come down tails both times.

3. One third of people in a club are men.
Two of the people in the club are chosen at random.
The probability that both these people are men is one tenth.
Calculate the number of people in the club.

4. The sides of a fair six-sided dice are numbered from 1 to 6.
The dice is thrown three times.
Find the probability that it shows a 1 at least twice.

THANK YOU SO, SO, SO MUCH TO ANYONE WHO HELPS ME ON ANY OF THE QUESTIONS :)
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