Answer:
The total number of boys = 105
Step-by-step explanation:
The ratio of boys to girls = 3: 4
⇒ For every 3 boys, there are 4 girls.
Now, total number of students = 245
Let the common ratio of boys to girls is k.
So, 3k + 4k = 245
or , 7k = 245
⇒ k = 245/7 = 35
⇒ k = 35
Hence, the number of boys = 3k = 3 x 35 = 105
and number of girls = 4k = 4 x 35 = 140
It must be testable and it must be falsifiable
Answer:
Height = 8
Step-by-step explanation:
Volume = Length x width x height
192 = 6 x 4 x H
192 = 24 x H
192/24 = H
8 = H
Height = 8
P(3) has a 10% chance (given)
P(1) or P(6): Add the two percentages together => 5 + 20 = 25%
P(not a 2): Subtract the percentage for 2 (25%) from 100% => 100 - 25 = 75%
Bolded numbers is your answer
hope this helps
Answer:
252
Step-by-step explanation:
Types of main courses available = 9
Types of drinks offered = 7
Types of deserts = 4
Number of different meals consisting of a main course, a drink and a desert offered
Using the combination rule :
9C1 * 7C1 * 4C1
nCr = n! ÷ (n-r)!r!
So using calculator we obtain :
9 * 7 * 4 = 252
