I have the answer in this picture. But im not sure if this might be really what your asking for.
Answer:
1/4 · x⁴
Step-by-step explanation:
Answer:
a the first one
Step-by-step explanation:
1/11 means 1 divided by 11
Red light is 15.1cm
yellow is 16.3cm
purple is 19.3cm
Total number of marbles in the bag =20
Number of blue marbles =4
Now we just want two blue marbles out of four.
Probability of taking out first marble which is blue =4/20
Now after we took out one blue marble , number of blue marbles left are 3.
Probability of taking out second marble which is blue =3/20
Total probability = 4/20 *3/20 = 12/400
So probability of taking out two blue marbles is 0.03 or 12/400.