WebIn a class of 40 students, what is the probability of finding five left- handers? 0.179 According to police sources, a car with a certain protection system will be recovered 85% of the time. Find the probability that 5 of 7 stolen cars will be recovered 0.210 The probability that a house in an urban area will be burglarized is 5%. WebSolution Average age of 40 students = 12 years Total age = 40 × 12 = 480 years Let the teacher be the 41st member. Average age now = 13 years Total age of 41 = 41 × 13 = 533 years Age of teacher = 533 - 480 = 53 years Suggest Corrections 2 Similar questions Q. The average age of 29 boys of a class is 17 years .
In a class of 40 students and 5 teachers, each student got sweets …
WebThere are ( 15 5) ways to choose five students for group ONE, Now, there are ( 10 5) ways to choose five students for group TWO, That leaves us with only five students: i.e., hence there is only ( 5 5) = 1 way to choose the students for group THREE. Multiplying these factors: WebMar 4, 2024 · Best answer Correct Answer - Option 3 : 53 years FORMULA USED: Average = Sum of numbers/Total numbers CALCULATION: Total age of the class (Only students) = 40 × 12 = 480 years And Total age of the class (With teacher) = 41 × 13 = 533 years Hence, Age of the teacher = 533 - 480 = 53 years ← Prev Question Next Question → Find MCQs & … how much is pa minimum wage
Mother of 6-year-old student who shot teacher charged with child ...
WebA class teacher has the following absentee record of 40 students of a class for the whole term. Find the mean number of days a student was absent. Solution Here, h = 6 Let the assumed mean, A be 21. We know Mean = A + h × ∑ f i u i ∑ f i ∴ Mean number of days a student was absent = 21 + 6 × - 46 40 = 21 - 6. 9 = 14. 1 WebMar 31, 2024 · The average age of a class of 40 students and a teacher reduces by 0.5 years if we exclude the teacher. The initial average age = 18 years. Formula used: Average = … WebSep 30, 2024 · This year, that school might give one teacher 50 students online, and split the remaining 50 among three teachers in the building. Ideally, this gives all teachers more … how much is p40 in south africa