Question

maths

From a lot of 20 bulbs which include 5 defectives a sample is drawn at random,one by one with replacement .find the probability distribution of the number of defective bulbs. Also find the mean of the distribution .

in triangle ABC if angle A= angle B, then what is AB:BC

Find the shortest distance between the following pair of lines. r¯=(i¯+2j¯+k¯)+λ(2i¯−j¯+3k¯) & r¯=(i¯−3j¯−k¯)+μ(3i¯+2j^−5k¯).

If cotA=12÷5,than the value of(sinA+cosA)cosecA is.

question no. 31 & 32

In the figure O is the center of circle and OM ON are perpendiculars from center to the chords PQ andRS.if OM=ON and PQ=6cm.find RS

1.  Theorem 6.2 - If a line divides any two sides of a triangle in the same ratio then the line is parallel to the third side

1.  Theorem 6.2 - If a line divides any two sides of a triangle in the same ratio then the line is parallel to the third side