A storeroom has only steel and copper rods in the ratio 4:3, respectively and the weight of each steel and each copper rod is in the ratio 5:6, respectively. If the total weight of all the rods in the storeroom is 190 kg, then what is the weight of one steel rod?
Let the number of steel and copper rods in the storeroom be ‘4k’ and ‘3k’, respectively Let the weight of one steel rod and one copper rod be ‘5y’ kg and ‘7y’ kg, respectively According to the question, 4k × 5y + 3k × 6y = 190 Or, 20ky + 18ky = 190 Or, 38ky = 190 Or, ky = (190/38) = 5 But since we do not have information regarding the exact number of rods in the room, we cannot determine the exact weight of one steel rod.
"A piggy bank comprises 5-rupee coins, 10-rupee coins, and 20-rupee coins. The quantity of 5-rupee coins in the piggy bank is 75% more than the number o...
If the letters of the word PARAM are arranged at random, what is the probability that all vowels will come together?
A bag has balls of three colours. It has 8 red balls, x green balls and y blue balls, If probability of picking one green ball and that of picking one b...
The names of 15 students from section A, 10 students from section B and 15 students from section C were selected. The age of all the 40 students was dif...
A bag contains cards which are numbered from 2 to 90. A card is drawn at random from the bag. Find the probability that the card number is a perfect squ...
In a group of artists, there are 10 dancers and 8 singers. If four artists are to be selected at random, what is the probability that 2 dancers and 2 si...
A bag contains 8 black and 10 white balls. One ball is drawn at random. What is the probability that the ball drawn is white?
...When two dice are thrown, what is the probability that sum of the number appeared is 4 or 5?
30 pens are there in a box where 9 are red pens, ‘p’ are blue pens and remaining are black pens. If a pen is picked, the probability of getting blue...
In a lottery, there are 6 prizes and 30 blanks. A lottery is drawn at random. What is the probability of getting a prize?
