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maths exam questions!

hi I wanted to create a new post so
there are 20 marbles, probability of a red one is 1/4 , one more red is added. what is thee new probability

2- box A has a ratio of apples to oranges= 5:7
box B has 2/5 of apples
which has the greater probability of choosing an apple ?

3- there are 7 white socks, 4 black socks
2 socks are taken without replacement
are the probabilities the same?

thank you

Reply 1

tats bentata

hey
do you want working as well?

i think these are the answers:
1. 2/7
2. box B has greater probability
3. taking out one black sock then another probability is 16/121
taking out one white sock then another probability is 49/121

i dont know if i understood the last question.....
hope it helps

(edited 6 years ago)