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Fittoniya [83]
3 years ago
9

I NEED HELP NOW PLS ASAP

Mathematics
2 answers:
castortr0y [4]3 years ago
8 0

Answer:

Step-by-step explanation:

hello,

I understand that there are only 4 cards  and then the player draw a card out of the 4 cards, replace it so the second draw is still out of the 4 cards

<u>How many ways can you draw two cards?</u>

as the first card is replaced, this is 4*4=16

so there is 16 possibles ways

hearts hearts

hearts clubs

hearts diamonds

hearts spades

clubs hearts

clubs clubs

clubs diamonds

clubs spades

diamonds hearts

diamonds clubs

diamonds diamonds

diamonds spades

spades hearts

spades clubs

spades diamonds

spades spades

<u>out of these 16 ways, how many have same colour for both cards?</u>

I assume that there are only two colours Red and Black, so we can have

only 8 ways so the first probability is 8/16 = 1/2

<u>out of these 16 ways, how many are red ace first and black ace?</u>

There are 4 ways so the probability is 4/16 = 1/4

hope this helps

valkas [14]3 years ago
4 0

Standard deck has aces in four colors

Player draws one from four so the probability of drawing any first card is 1/4 (in the first drawing)

We replace the card so in second drowing its the same

So the probability of drawing two card of one chosen color is 1/4*1/4, and we have four colors

The probability of drawing two card of the same color is:

<h3>1/4*1/4*4 = 1/4</h3>

There are 2 red aces and 2 black aces

(sorry for coments - not reading carefully)

So a probability of drawing red ace in first drawing is 2/4=1/2

a probability of drawing black ace in second drowing is the same ('cause we replace the one drawn first)

So the probability that a red ace is drawn first and then the black ace is:

<h3>1/2*1/2 = 1/4</h3>

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Given: 2q – r = 4p, 2r = q, r = 2p; Prove: q = r
Gnoma [55]

Answer:

q = r

Step-by-step explanation:

<u><em>Explanation:-</em></u>

Given    2q – r = 4p ...(i)

                  2r = q...(ii)

                  r = 2p ...(iii)

Substitute 2r = q in equation (i)

            <em>   2(2r) – r = 4p </em>

                     3 r = 4 p

                 <em>  2 r + r = 4 p</em>

                   2 r + 2 p = 4 p

                  2 r = 2 p

                 <em>  q = r</em>

         

5 0
3 years ago
Use Gauss's approach to find the following sums (do not use formulas) a 1+2+3+4 998 b. 1+3+5 7+ 1001 a The sum of the sequence i
valkas [14]

Answer:

(a) 498501

(b) 251001

Step-by-step explanation:

According Gauss's approach, the sum of a series is

sum=\frac{n(a_1+a_n)}{2}         .... (1)

where, n is number of terms.

(a)

The given series is

1+2+3+4+...+998

here,

a_1=1

a_n=998

n=998

Substitute a_1=1, a_n=998 and n=998 in equation (1).

sum=\frac{998(1+998)}{2}

sum=499(999)

sum=498501

Therefore the sum of series is 498501.

(b)

The given series is

1+3+5+7+...+ 1001

The given series is the sum of dd natural numbers.

In 1001 natural numbers 500 are even numbers and 501 are odd number because alternative numbers are even.

a_1=1

a_n=1001

n=501

Substitute a_1=1, a_n=1001 and n=501 in equation (1).

sum=\frac{501(1+1001)}{2}

sum=\frac{501(1002)}{2}

sum=501(501)

sum=251001

Therefore the sum of series is 251001.

8 0
3 years ago
Two ratios (fractions) that are equal to each other.
HACTEHA [7]
The statement that they're equal is called a proportion.
3 0
4 years ago
Rewrite the phrase using the commutative properties.<br><br> x + y
rodikova [14]

Answer: y+x

Step-by-step explanation: The commutative property is like no matter how much you switch the numbers around you gonna get the same answer

4 0
3 years ago
Find the GCF of 14, 56, 63
jasenka [17]
Answer: 7


Explanation: 14 would not work out.

56/14 = 4

63/14= 4.5


In conclusion 7 would work out.


14/7 =2

56/7=8

63/7=9
3 0
3 years ago
Read 2 more answers
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