A number of students prepared for an examination in Maths, Physics and Chemistry. Out of this number 15
took Physics. 20 took
Chemistry and 23 took Maths,
9 students took both Chemistry and Maths, 6 took both
Physics and Math and all those who took Physics also took Chemistry. One student fell ill and failed to write
any of the papers. Use the above information and illustre
illustrate it on a Venn diagram.
(a) How many students took’exactly one of the examination
(b)How many students took exactly two of the examination papers
(c) How many students took all the three examination papers?
(d)How many students prepared for the examination papers

mark branliest

step-by-step explanation:

.6 is 1/2 of 12

the answer is actually d. i just took the test

step-by-step explanation:

we are given a graph for system of inequalities.

in order to write the system of inequalities for the given graph, we need to find the inequality for each of the line separately.

let us find the slope of dotted line first.

taking two coordinates on the graph.

let us say (0,0) and (3,1).

let us find the slope of the line now.

slope of the dotted line would be =.

y-intercept of dotted line is y=0 only.

plugging slope m= and b=0 in slope-intercept form y=mx+b, we get

.

the line is shaded up of that dotted line.

therefore, for shading up we would take greater than inequality symbol > .

and because it's a dotted line we would take only > symbol in place of = sign in above equation of line.

therefore, inequality for dotted line would be

let us take two points (3,1) and (0,4) on the solid line.

slope of the solid line would be =.

for the solid line we have y-intercept b= 4.

plugging slope m= -1 and b=4 in slope-intercept form y=mx+b, we get

y = -1x + 4.

the line is shaded down of that solid line.

therefore, for shading down we would take less than inequality symbol < .

and because it's a solid line we would take ≤ symbol in place of = sign in above equation of line.

therefore, inequality for solid line would be

can you rephrase the question ? it is unclear : -)

step-by-step explanation:

where is the picture

step-by-step explanation: