WebA school has found from past records that the average scores for boys is 85 in a sample of 30 boys and the average scores for girls is 75 in a sample of 45 girls. The population standard deviations for girls' and boys' scores were 25 and 17, respectively. The 99% confidence interval for the difference of the population means (girls minus boys)is. WebApr 11, 2024 · Registration is now open for this year's Elmwood Park High School summer athletic camps. The camps include multiple grade-level offerings in baseball, basketball, cheer, dance, football, running, soccer, tennis, volleyball and wrestling. Details about softball camp will be posted when they become available. Students and parents can find the …
Primary School Age Education - UNICEF DATA
WebWe know that, number of girls is 504. Let the total number of students be x. Then, 30% of x = 504. So, 30/100 * x = 504. So, x = 504 * 100/30. So, x = 1680 students. Then, the number of … how to delete yahoo email account 2022
in a school 35 boys and 85 girls appeared in an examination.the …
Web70% of students are boys. Then, 30% of students are girls. ( Because the total will be 100%) We know that, number of girls is 504. Let the total number of students be x. Then, 30% of x = 504. So, 30/100 * x = 504 So, x = 504 * 100/30 So, x = 1680 students Then, the number of boys is 1680 - 504 = 1176 Therefore, there are 1176 boys in the school. mean marks for 85 boys = 40%. Sum of all the marks for the 86 boys = 40 x 85 = 3400%. mean marks for 35 girls = 60%. Sum of all the marks for the 35 girls = 60 x 35 = 2100%. Total number of students = 85 + 35 = 120 students. Total marks = 3400 + 2100 = 5500%. Average marks = 5500 ÷ 120 = 45.8%. Answer: The average percentage of the school is ... Webanswer (1 of 15): class fraction=8 no. of girls fraction=3/8 no. of boys=5/8 girls in no. and fraction= 15 and 3 which means 3=15 1=5 fraction of class=8 = 1=5 8=40 ... how to delete yahoo app