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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$ ??
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
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%
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thank you !

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