Suppose that scores on an exam are normally distributed with mean 80 and standard deviation 5, and that scores are not rounded.
1 answer:
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Answer:
Each cake cost £ 13.00
Step-by-step explanation:
We were given that, each cake costs or £
Andy buys cakes.
Andy's cost is
£
Betty buys 4 times as many cakes as Andy.
Betty's cost is
£
£
Colin buys 3 more cakes than Andy
Colin's cost is
£
The total cost of the cakes is £ .
This implies that,
We expand to get,
We group like terms to get,
This gives us,
This implies that,
Therefore each cake cost £ 13.00