The probability of drawing a red or blue marble from a bag with 15 marbles is 80 percent.

Which best describes the probability of drawing a red or blue marble?

Question

The probability of drawing a red or blue marble from a bag with 15 marbles is 80 percent. 

Which best describes the probability of drawing a red or blue marble?

anonymous · Answer

@SolomonZelman 
gonna start tagging people (10 mins no answer)

anonymous · Answer

@ganeshie8 @ParthKohli @satellite73

solomonzelman · Answer

Well assuming that the probability of red is equal to probability of blue...

80% of the bag are both blue+red and the bag contains 15 marbles.
So 12 would be 80% of 15.

and if the probability of red or blue is 12 out of 15, saying that there are 12 marbles that are blue and red, it's got to be that there are 6 red and 6 blue.

anonymous · Answer

A.
impossible
 
 B.
unlikely
 
 C.
likely
 
 D.
certain
Is it C?

anonymous · Answer

@SolomonZelman

solomonzelman · Answer

Well, it's like very very likely, so I would say D.

I don't know to what extent (of being likely to happen) is each of the choices according to the way the teachers taught you.

solomonzelman · Answer

unless certain means for sure (like 100%), than it would be C.

anonymous · Answer

Turns out it was D. Thanks for the help (bit of a weird answer) but yeah!

solomonzelman · Answer

I really never thought of such questions in terms of certain likely and such other terms... I just count and give a mathematical answer.