This maths question i don’t really understand
2 answers:
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Answer: c) 0.75
Step-by-step explanation:
Given : The probability of choosing a black marble is P(Black)= 0.36.
The probability of choosing a black and then a white marble is P( Black and white) = 0.27.
Then by conditional probability ,
The probability of the second marble being white if the first marble chosen is black =
Therefore , the probability of the second marble being white if the first marble chosen is black = 0.75
Answer: 3.5"
64:80::2.8":x
2.8x80=224
224/64=3.5"
