Mathematics
There are some red, green and white marbles in a box. One marble is picked up at random from this box. If the probability of picking up a red marble 2/9 is and that of picking up a green marble is 4/9 then find the : (a) probability of picking up a white marble. (b) number of green marbles, if total number of marbles is 54. (c) probability of not picking up a red marble.
Related Questions
If the 6th term of a series in Geometric Progression (G.P.) is 32 and the 9th term is 256, find the:
(a) first term and the common ratio.
(b) sum of its first 10 terms.
An ice cream cone has a diameter of 7 cm and its height is 9 cm. It is filled with a scoop of spherical shaped ice cream of radius 3.5 cm.
Find: (Give all answers correct to the nearest whole number)
(a) on melting, is the ice cream sufficient to fill the cone completely without any wastage?
(b) the volume of ice cream, if any, is in excess or less.
Mr. Anil has a recurring deposit account. He deposits a certain amount of money per month for 2 years. If he received an interest whose value is the double of the deposit made per month, then find the rate of interest.
If a, b, c and d are in continued proportion, prove that ad(c2 + d2) = c3(b + d).