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Sixty percent of the students at a certain school wear neither a ring nor a necklace. Twenty percent wear a ring and 30 percent wear a necklace. If one of the students is chosen randomly, what is the probability that this student is wearing

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akiran007

Answer:

Probability would be 40 % or 0.4

Step-by-step explanation:

Sixty percent of the students at a certain school wear neither a ring nor a necklace.

Since the given event and the event asked are mutually exclusive events ( that is they both cannot occur together )  the formula to subtract the value of the given probability from one will be used .

Probability ( the students wear a ring or a necklace or both ) = 1- P( not wearing anything)

Probability ( the students wear a ring or a necklace or both ) = 1- 0.6= 0.4

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