All Puzzles
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The cost of eggs at a local shop in Burnley:
- Cost of one snake egg: 5 pence.
- Cost of one Echidna egg: 1 penny
- Cost of 20 Bird eggs: 1 penny
John entered the shop and he need to buy
- All types of eggs.
- birds egg in multiple of 20.
- Total of 100 eggs
How many Snake, Echidna, and Bird eggs does John need to buy considering he got only 100 pence?
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You went to a bank to cash out your cheque.
By mistake the bank cashier gives you-
- Dollar amount in cent, and
- Cent amount in dollars.
On the way home you spends 5 cent, and then suddenly you notices that you have twice the amount of your cheque.
How much was have you written on cheque ?
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- 2 answers
- 1 votes
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The lifetime of a color TV picture tube is normally distributed, with a mean of 8 years and a std. dev. of 2 years.
(i) What is the probability that a picture tube will last more than 10 years?
(ii) If the firm guarantees the picture tube for 4 years, what percentage of the tubes sold will have to be replaced?
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