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Usimov [2.4K]
2 years ago
13

Alison has 6 yellow discs, 5 blue discs and 9 red discs which she places in a bag. When she draws one disc out, what is the prob

ability that the disc is NOT red?​
Mathematics
2 answers:
mariarad [96]2 years ago
7 0

Answer: 11/20

The total number of discs are 6+5+9 is 20... and the number of discs that are not red is 20-9 which is 11. So,

11/20

Brainliest pwease if it is correct!

<h2> ૮₍•᷄ ᴥ •᷅₎ა</h2>
kirill115 [55]2 years ago
3 0

Answer:  11/20

explanation:

We know that, Alison has 6 yellow discs, 5 blue discs and 9 red discs

so total he has 6 + 5 + 9 = 20 discs in total

to find the probability of the disc is not red

we have to use the formula :     total disc - red disc / total discs

                                                  20 - 9 / 20

                                               11/20 is the probability of not getting a red disc

OR,

  • we can find the probability of getting a red disc :

         =   red disc / total discs

         =    9/20

  • now disc is not red = 1 - 9/20

       =     11/20

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