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S

  • 3 years ago

In a discount supermarket, it is found that 70% of the sales are for less than 50$. Find the probability a) Four randomly selected sales are each less than 50$ b) at least one of four randomly selected sales is 50$ or more c) 8 or more of 12 sales are less than 50$ ??

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  1. cherio12
    • 3 years ago
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    a) .7*.7*.7*.7=24.01% b) At least one ..100-24.01=75.99% c) .7^8+.7^9+.7^10+.7^11+.7^12=15.99%

  2. S
    • 3 years ago
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    thank you !

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