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Gala2k [10]
3 years ago
15

A bag holds 1 blue block and 3 yellow blocks. How many green blocks should be added to the bag to make the probability of random

ly selecting a green block from the bag equal to 1/2 ?
Mathematics
2 answers:
Klio2033 [76]3 years ago
8 0

Answer:

Step-by-step explanation:

ITS 4

Drupady [299]3 years ago
6 0
n - the number of green blocks which is equal to the number of favourable events
1+3+n=4n - the number of all blocks, which is equal to the number of all possible outcomes

P(A)=\dfrac{n}{4+n}=\dfrac{1}{2}\\
1\cdot( 4+n)=2\cdot n\\
4+n=2n\\
2n-n=4\\
n=4

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