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Zarrin [17]
3 years ago
9

"Sam" and "Martha" are the local names for two lighthouses that guard a particularly dangerous part of the coast. Sam blinks eve

ry 12 seconds, and Martha blinks every 8 seconds. They blink together at midnight. How many seconds will pass before they blink together again?
Mathematics
2 answers:
Korvikt [17]3 years ago
7 0

Answer:

at 12 o'clock am they will blink at the same time again

Step-by-step explanation:

Hunter-Best [27]3 years ago
4 0

Answer:

Sam and Martha will blink again in 24 seconds :)

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Answer:

1 / 51

Step-by-step explanation:

Given that :

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There are 685464 ways of selecting the 5-card hand

Step-by-step explanation:

Since the hand has 5 cards and there should be at least 1 card for each suit, then there should be 3 suits that appear once in the hand, and one suit that apperas twice.

In order to create a possible hand, first we select the suit that will appear twice. There are 4 possibilities for this. For that suit, we select the 2 cards that appear with the respective suit. Since there are 13 cards for each suit, then we have {13 \choose 2} = 78 possibilities. Then we pick one card of all remaining 3 suits. We have 13 ways to pick a card in each case.

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