Question

90% students were present in school if 20students are absent then find total no.of students

Answer 1

Answer:

120 students were absent

Step-by-step explanation:

Total number of students = 1200

⇒⇒ 100% = 1200

.

Percentage of students that were absent:

100 - 90% = 10%

.

Find 10% (student that were absent):

100% = 1200

1% = 1200 ÷ 100 = 12

10% = 12 x 10 = 120

Answer 2

Answer:

The answer is 200

Step-by-step explanation:

% of students present = 90%

% of students present = 90%% of students absent. = 100% - 90%

% of students present = 90%% of students absent. = 100% - 90% =10%

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 20

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 2010/100 of x = 20

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 2010/100 of x = 201/10 of x = 20

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 2010/100 of x = 201/10 of x = 20 x= 20×10

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 2010/100 of x = 201/10 of x = 20 x= 20×10therefore x= 200

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 2010/100 of x = 201/10 of x = 20 x= 20×10therefore x= 200that is total no. of students = 200

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 2010/100 of x = 201/10 of x = 20 x= 20×10therefore x= 200that is total no. of students = 200Then no. of students present = no.of students - no. of absent

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 2010/100 of x = 201/10 of x = 20 x= 20×10therefore x= 200that is total no. of students = 200Then no. of students present = no.of students - no. of absent = 200- 20

% of students present = 90%% of students absent. = 100% - 90% =10%no of students absent=20no of total students be x10%of x = 2010/100 of x = 201/10 of x = 20 x= 20×10therefore x= 200that is total no. of students = 200Then no. of students present = no.of students - no. of absent = 200- 20 = 180