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vodomira [7]
3 years ago
9

A bag contains tiles with the letters p -r-o-b-a-b-i-l-i-t-y Tyler chooses a tile without looking and doesn't replace it he choo

ses a second tile without looking what is the probability that he will choose the letter i both times
1/55
2/55
2/121
3/121
Mathematics
2 answers:
ipn [44]3 years ago
7 0

Answer:

\frac{1}{55}

Step-by-step explanation:

Total number of tiles: 11 (obtained from counting the letters in probability)

Probability of picking the letter "i" the first time:

There are 2 letter "i's", and 11 total options, so the probability of picking an "i" is:

\frac{2}{11}

Probability of picking the letter "i" the second time:

We now have one less letter in the bag, as the first letter "i" was not replaced.

This means we now only have 1 letter "i", and 10 total options, so the probability of picking the last "i" is:

\frac{1}{10}

When you have two probabilities that are dependant on each other, you multiply them to get the probability of one, given that the other has happened.

Total probability:

\frac{2}{11}*\frac{1}{10} = \frac{2}{110}

Simplify by dividing by 2:

\frac{1}{55}

butalik [34]3 years ago
6 0

Answer:

Multiply the fractions/probabilities

2 wanted tiles / 11 tiles in total x 1 wanted tile / 10 total tiles in total = 2/110 chance

2/110 = 1/55 chance

Hope this helps

Step-by-step explanation:

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