Subject
Bank Exam
Topic
Exim Bank Trainee Officer 2015
In a class, 50% of the male students and 2/3 of the female students speak French. If there are ¾ as many girls as boys, what fraction of the entire class speaks French?
In a class, 50% of the male students and 2/3 of the female students speak French. If there are ¾ as many girls as boys, what fraction of the entire class speaks French?
ক)
4/7খ)
3/4গ)
1/4ঘ)
2/3Explanation
x=# of boys in the class y=# of students that speak French Therefore we are looking for y / (total number in class). But the total number in the class is boys plus girls, so x + 3/4x=7/4x The 3/4 is because they told us there are 3/4 as many girls as boys. So now y / (total number in class) = y / (7/4x) Now we know that the number of students that speak French are: 1/2 boys +2/3 girls or 1/2x + 2/3(3/4x) = y = 1/2x + 6/12x = x Therefore y / (7/4x) = x / (7/4)x = 4/7 So the curve ball here is that the number that speak French just happens to be equal to the number of boys in the class, and boys make up 4/7 of the class as well.Related questions
A man rowed 3 miles upstream in 90 minutes. If the river flowed with a current 2 miles per hour, how long did the man’s return trip take?A 12 gallon tub has a faucet that lets water in at a rate of 3 gallons per minute, and has a drain that lets water out at a rate of 5 gallons per minute. If you start with 3 gallons of water in the tub, how long will it take to fill the tub completely?If the sum of three consecutive integers is less than 75, what is the greatest possible value of the smallest one?Which one of the following is the minimum value of the sum of two integers whose product is 36?There are 4 women and 4 men sitting in a waiting room for job interview. If two of the applicants are selected at random, what is the probability that both will be women?The chairperson (A)emphasized that(B)noneissues (C)except thosein the agenda (D)can beraised in the meeting.(E) No error.Hamed is 7 years older than his brother Shaquib, who is twice as old as their younger sister Lopa. If Lopa is 15 years younger than Hamed. Then how old is Shaquib?What percentage of numbers from 11 to 90 has 0 or 5 in the unit’s digit?