There are 51 students in three classes. How many students are there in 5 such
classes?
Answers
Answer:
85
Step-by-step explanation:
3 classes = 51 students
1 class = 51/3 = 17
Students in 5 classes = 17*5 = 85
Answer:
There are 85 students in 5 classes
Step-by-step explanation:
Let's say that there are equal number of students in each class.
Now, there are two unique methods to solve it.
Method 1 (Unitary method)
3 classes have 51 students
When the number of students in each class are equal.
3 classes = 51 students
1 class = 51/3 students
1 class = 17 students
Thus, in 5 classes,
1 class = 17 students
5 classes = 17 × 5 students
5 classes = 85 students
Hence, there are 85 students in 5 classes.
Method 2 (Proportionality method)
3 classes have 51 students
Let 5 classes have x students
Since, there are equal students in all classes they are proportional.
Thus,
3 : 51 :: 5 : x
We know that,
Product of extremes = Product of means
3 × x = 51 × 5
3x = 255
x = 255/3
x = 85 students
OR
(3/51) = (5/x)
Cross multiplying we get,
3 × x = = 51 × 5
3x = 255
x = 255/3
x = 85 students
Hence, there are 85 students in 5 classes.
Hope it helped and believing you understood it........All the best