Two thirds of the students in class 1 of grade 6 subscribe to primary school students' mathematics newspaper, and three quarters subscribe to mathematics PHS At least ()

Two thirds of the students in class 1 of grade 6 subscribe to primary school students' mathematics newspaper, and three quarters subscribe to mathematics PHS At least ()

5 out of 12, 2 / 3 + 3 / 4 minus 1

The sixth grade subscribes to "primary school students' composition selection" and "primary school students' study newspaper". Each student subscribes to at least one of them. 35 of the students in the whole grade subscribes to "primary school students' composition selection" and 47 subscribes to "study newspaper". There are 6 people subscribing to both. How many people subscribing to "primary school students' composition selection"?

6 △ (35 + 47-1) × 35 = 6 △ (4135-1) × 35 = 6 △ 635 × 35 = 35 × 35 = 21 (people); answer: there are 21 people subscribing to the selected compositions of primary school students

There are 120 students in the sixth grade of a primary school. 60% of them subscribe to China Youth Daily and 50% subscribe to math PHS. How many people subscribe to both magazines

120 * 60% = 72, 120 * 50% = 60
72-60 = 12