Question

A bag contains 5 red balls and some blue balls. If the probability of drawing a blue
ball from the bag is thrice that of a red ball, find the number of blue balls in the bag

1. Let vector a =î+j+k, vector b =î and vector c =c1 î + c2 j+ c3 k then  if c2 =-1 and c3 =1 find c3 which no value of c1 can makes  vector a ,b and vector c

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In part (v) you only proved opposite sides equal,but to prove a figure a parallelogram we need to prove opp. sides equal AS WELL AS parallel

9.3 3 class 9

A girl of height 90cm is walking away from the base of a lamp post at a speed of 1.2m/sec. If the lamp is 3.6m above the ground, find the length of her shadow after 4 sec.

first of all i would like to thank u

A train takes 2 hours less for a journey of 300 km if it's speed is increased by 5 km/h from its usual speed. Find the usual speed of the train