Lucy rolls 2 fair dice and adds the results from each. Work out the probability of getting a total less than 10

27/36

Step-by-step explanation:

30

Step-by-step explanation:

2+6, 2+2, 2+3, 2+4, 2+5, 2+1

3+3, 3+4, 3+2, 3+1, 3+6, 3+5

1+1, 1+2, 1+3, 1+4, 1+5, 1+6

4+1, 4+2, 4+3, 4+4, 4+5

5+1, 5+2, 5+3, 5+4

6+1, 6+2, 6+3

Therefore the probability of getting a total less than 10 is 30.

the discriminant is 64 + 4*1*12 = 112

this is prime.

step-by-step explanation:

probability for j is 1/4

while

a is 1/6