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2 years ago

13

The book Kathy is reading is 540 pages long. So far, she has read 405 pages. What percent of the book does she have left to read

?
A. 20%
B. 25%
C. 75%
D. 80%

2 answers:

Elan Coil [88]2 years ago

8 0

405/540 = 0.75 —> 75%

The answer is C.

hichkok12 [17]2 years ago

5 0

Answer:

B. 25%

Step-by-step explanation:

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At a school with 100? students, 33 were taking? Arabic, 32 ?Bulgarian, and 40 Chinese. 9 students take only? Arabic, 12 take onl

Stels [109]

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Let 'p' represents the number of students who take all the three languages, then

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Also,

$n(A)-n(A\cap B)-n(A\cap C)+n(A\cap B\cap C)=9\\\\\Rightarrow n(A\cap B)+n(A\cap C)=24+p~~~~~~~~~~~~~~(a),\\\\n(A\cap B)+n(B\cap C)=20+p~~~~~~~~~~~~~~(b),\\\\n(B\cap C)+n(A\cap C)=20+p~~~~~~~~~~~~~~~(c).$

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Figure 2 and 3:

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