Echotastic

7 Questions
3 Answers

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1315

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An equilateral triangle shares a common side with a square as shown. What is the number of degrees in m

An equilateral triangle shares a common side with a square as shown. What is the number of degrees in m

Echotastic Mar 22, 2018

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1574

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In the diagram, if $\angle PQR = 48^\circ$ , what is the measure of $\angle PMN$?

In the diagram, if $\angle PQR = 48^\circ$ , what is the measure of $\angle PMN$?

read more ..

Echotastic Mar 21, 2018

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3774

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A standard deck of 52 cards has 13 ranks (Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King) and 4 suits (, , , and ), such that

A standard deck of 52 cards has 13 ranks (Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King) and 4 suits (, , , and ), such that there is exactly one card for any given rank and suit. Two of the suits ( and ) are read more ..

Echotastic Feb 23, 2018

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974

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A standard deck of 52 cards has 13 ranks (Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King) and 4 suits (, , , and ), such that

A standard deck of 52 cards has 13 ranks (Ace, 2, 3, 4, 5, 6, 7, 8, 9, 10, Jack, Queen, King) and 4 suits (, , , and ), such that there is exactly one card for any given rank and suit. Two of the suits ( and ) are read more ..

Echotastic Feb 20, 2018

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3315

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some confusion?

1) During a party, a total of 78 handshakes occurred. If each person shook hands once with each of the other people, how many people were at the party?

2) How many distinguishable ways are there to write 9 as the sum of read more ..

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Echotastic Feb 18, 2018

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5035

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More questions.. Halp!

1) In how many ways can I arrange 3 different math books and 5 different history books on my bookshelf, if I require there to be a math book on both ends?

2) I have 10 distinguishable socks in my drawer: 4 white, 4 brown, read more ..

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Echotastic Feb 17, 2018

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819

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Permutation help?

In SHORT BINGO, a card is filled by marking the middle square as WILD and placing 24 other numbers in the remaining 24 squares.
Specifically a card is made by placing 5 numbers from the set 1-10 in the first column, 5 numbers from 11-20 in read more ..

Echotastic Feb 17, 2018

+37

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209/210 You subtract the probability of getting a zero from 1

EchotasticFeb 20, 2018

+37

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What about 2)? I'm really confused on that one.

EchotasticFeb 18, 2018

+37

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Hi, I don't understand how you got the p(3,2) can you explain it to me? (Thank you! I'm really struggling with this topic.)

EchotasticFeb 18, 2018