Two red and two blue blocks are placed into a bag. you take one of the blocks out of the bag. what is the probability the block is not red?

The probability of picking NOT A RED block  is (1/2).

Step-by-step explanation:

Number of Red blocks = 2

Number of Blue blocks = 2

Total blocks in the bag = 2 + 2 = 4

Let E: Event of Picking a red Block

Probability of any event E =

Here, P(red block) = 2 /4 = 1/2

Now, As we know P(Event E) + P(Not E) = 1

Hence, P (not red block) = 1 - P(red block)

= 1 - (1/2) = 1/2

So, the probability of picking NOT A RED block is (1/2).

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step-by-step explanation:

ratio is 2 : 9

the answer is three

13.5 : 3