In a competitive exam 50 students passed in English. 60 students passed in Mathematics 40 students passed in both the subjects. None of them fail in both the subjects. Find the
number of students who passed at least in one of the subjects ?

who solve this question
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30

Step-by-step explanation:

let n(m)=50

n(E)=60

n(mnE)=40

:. (50-40)+ (60-40)=30

i = 2 / - 5

step-by-step explanation:

evaluation of ( 2 - 4 ) ( p + q ) when p = 2 and q = 5 i, by putting values of p and q,                                                                    

answer:  

step-by-step explanation:

here x represents the height of the pole,

and, the height of the shadow of the pole is 12 feet.

also, the angle of elevation from the top of the pole is 40°,

therefore,

by the low of sine,

which is the required equation for finding the value of x,