COMPOUND PROBABILITIES - URGENT!

21/33

Step-by-step explanation:

1. 8+10+3+12=33 students in school

2. Now, you find how much students play violin or guitar

- 8 students only play violin

- 10 students only play guitar

- 3 students play both

3. 21 students in total who play violin or guitar

4. Since there are 33 students total, 21 out of 33 play those instruments

(If its not right, then adding in the 3 students who play both is probably a mistake :P)

7/11

Step-by-step explanation:

There are a total of 33 students in this problem. The prompt tells us there are 8 students who play the violin, 10 students that play guitar, and 3 students who play both. Therefore, out of 33 students, there are 21 that play violin or guitar.

21/33 = 7/11

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2

18.8cm hope i at all

step-by-step explanation: