A bag contains 5 identical balls of which
there is one red, one blue and the rest are
white. What is the probability of selecting
at least one white balls, if 3 balls are selected.
A man standing 10m away from a plane
mirror moves towards the mirror with a
speed of 2m/s. Calculate
(a) The speed with which his image in the
mirrow approaches him
(b) How far is the man from his image
after 3 seconds.
let a∈[0,1] find all continuous function
f:[0,1]→[0,∞) such that ∫_0 ^1 f(x)dx = 1 ,
∫_0 ^1 xf(x)dx = a and ∫_0 ^1 x^2 f(x)dx = a^2
how many such function are there ?