Suppose you draw one card from a standard deck of cards has 4 of each type of card ,so the deck contains 4kings 4queens . what is the probability that the card is a king or queen? explain.

2/13

Step-by-step explanation:

The probability of drawing a king is 1/13 and a queen is a 1/13. 1/13+1/13 is 2/13.

Another way you could solve it is if you add 4=4, which is 8. There are 8 kings and queens. And there are 52 cards in a deck. 8/52 is the same as 2/13.

step-by-step explanation:

12: 00 p.m. to 7: 00 p.m. is a total of 7 hours.

4: 00 p.m. to 7: 00 p.m. is a total of 3 hours.

this means that from 4: 00 p.m to 7: 00 p.m. this represents 3/7 of what was lost from 12: 00 p.m. to 7: 00 p.m.

after knowing this, after doing 11,600 - 6,800 = 4,800

4,800 represents 3/7 of what was lost for 7 hours.

we then divide 4,800 by 3 which gets 1,600.

because we know that 1,600 represents 1/7 of how much water was lost, we just have to multiply by 7, which gets 11,200.   after adding 11,200 to how much water was left at 7: 00 p.m. which was 6,800. 11,200 + 6,800 = 18,000

this means that the pool originally had 18,000 gallons in the pool.

you can also check your work by doing 18,000 - 4(1600), which becomes           1800 - 6400 which gets you 11,600.

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im not sure