3 years ago

1 point

Mathematics

1 answer:

damaskus [11]3 years ago

8 0

Answer:

Step-by-step explanation:

I think the question is card(A)=20,card(B)=15,card(A∩B)=10, then what iscard(A∪B)

You can solve this question by drawing a picture like this to visualize the problem.

Thus the answer is card(A∪B)=card(A)+card(B)−card(A∩B)=25

You might be interested in

. The selling price of 15 articles is Rs 1,500 at a gain of 8%. Find C.P of each article

Andru [333]

Rs. 92.59 is each article's CP

Step-by-step Explanation:-

As per conditions given,

$1500 \div 15 \div (1 + 8$ %)

$= > 100 \div 1.08$

$= > approx. \: 92.59$

Hence, the CP of each article is Rs. 92.59

3 0

2 years ago

If A ABC-A DEF, find mZA. O 67 O 54 59 O 69

marysya [2.9K]

Answer:

Step-by-step explanation:

8 0

3 years ago

Triangle GHI is translated using the rule (x, y) (x + 5, y) to create triangle G’H’I. If a line segment is drawn from point G to

Kamila [148]

Answer:

it’s B

Step-by-step explanation:

i got it right

6 0

3 years ago

Read 2 more answers

A local civic theater has 22 seats in the first row and 21 rows in all. Each successive row contains 3 additional seats . How ma

I am Lyosha [343]

The correct answer is 525seats in the civic theatre.

8 0

3 years ago

Student Produced Response - Calculator

faltersainse [42]

Answer:

$\dfrac{a}{b}=0.75$ .

Step-by-step explanation:

If two equations $a_1x+b_1y+c_1=0$ and $a_2x+b_2y+c_2=0$ has infinitely many solutions, then

$\dfrac{a_1}{a_2}=\dfrac{b_1}{b_2}=\dfrac{c_1}{c_2}$

The given equations are

$ax+by=10$

$3x+4y=20$

It is given that the above system of equations has infinitely many solutions. So,

$\dfrac{a}{3}=\dfrac{b}{4}=\dfrac{10}{20}$

$\dfrac{a}{3}=\dfrac{b}{4}=\dfrac{1}{2}$

Now,

$\dfrac{a}{3}=\dfrac{1}{2}$ and $\dfrac{b}{4}=\dfrac{1}{2}$

$a=\dfrac{3}{2}$ and $b=\dfrac{4}{2}$

$a=1.5$ and $b=2$

So, a=1.5 and b=2.

Now,

$\dfrac{a}{b}=\dfrac{1.5}{2}=0.75$

Therefore, $\dfrac{a}{b}=0.75$ .

5 0

4 years ago