The probility that a stundent selected in a class will pass mathematics test is 3/5. How many selected are likely to fail mathematics in the class with 65 stundent
3 / 5 = 3 • 20 / 5 • 20 = 60 / 100 = 60%
100% - 60% = 40% = 40 / 100 = 0.4
0.4 • 65 = 26
26 students will not pass matematic.
OR
( 1 - 3 / 5 ) • 65 = ( 5 / 5 - 3 / 5 ) • 65 =
2 / 5 • 65 = 130 / 5 = 26
You can also solve this in the third way.
3 / 5 of 65 = 3 / 5 • 65 = 195 / 5 = 39
39 students will pass matematic.
65 - 39 = 26
26 students will not pass matematic.
To find the number of students likely to fail mathematics in a class of 65 students, we need to determine the fraction of students who are likely to fail based on the given probability.
The probability of a student passing the mathematics test is 3/5, which means the probability of failing is 1 - 3/5 = 2/5.
Therefore, the fraction of students likely to fail is 2/5.
To calculate the number of students likely to fail, we multiply the fraction by the total number of students in the class:
Number of students likely to fail = Fraction of students likely to fail x Total number of students
Number of students likely to fail = (2/5) x 65
Number of students likely to fail = (2/5) x 65
Number of students likely to fail = 26
So, it is likely that 26 students will fail mathematics in the class of 65.
To determine the number of students likely to fail mathematics in a class of 65 students, we need to calculate the fraction of students who are likely to fail based on the given information.
The probability that a student selected in the class will pass the mathematics test is 3/5. This means that out of every 5 students, 3 are likely to pass.
To find out how many students are likely to fail, we can subtract the number of students likely to pass from the total number of students.
Number of students likely to fail = Total number of students - Number of students likely to pass
Number of students likely to fail = 65 - (3/5 * 65)
To calculate this:
Step 1: Convert the fraction 3/5 to a decimal by dividing the numerator (3) by the denominator (5).
3 ÷ 5 = 0.6
Step 2: Multiply the decimal obtained in Step 1 by the total number of students (65).
0.6 * 65 = 39
Therefore, the number of students likely to fail mathematics in a class of 65 students is 39.