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**andrew2322** Hello can you pls help me solve this

1.) There is a red and a blue die labelled 1 - 6.

a.) Find the probability that one attains a a number LESS than 5 on the red die.

The answer i got was 2/3 pls confirm. Mr F says: Confirmed (assuming the die is unbiassed).

2.)In a school, 20% of its students failed physics, 15% failed biology and 12% failed both.

a.) Find the probabililty that a person did not fail physics. I got 0.80 Mr F says: Confirmed.

b.) Find the probability a person selected at randome failed physics, bio or both. I got 0.23 Mr F says: Confirmed.

THanks alot guys