Answer Posted / kermit rose

Let the number of males be given the name M.
Let the number of females be given the name F.

If 15 females are absent, then M will be twice that of
present females.
This means that M = 2 * (F - 15)

M = 2 * F - 30.

or 2 * F - M = 30.

Now if in addition to the 15 females being absent, we also
have 45 males being absent,

then this gives the equation,

(F - 15) = 5 * (M - 45)

which simplifies to

F - 15 = 5 * M - 225

5 * M - F = 210

Pulling the equations together, we get

5 * M - F = 210
-M + 2 * F = 30

Multiply the first equation by 2, and keep the second
equation as is.

10 * M - 2 * F = 420
- M + 2 * F = 30

Add the equations.

9 * M = 450

M = 50

Verify answer.
Calculate F
from - M + 2 * F = 30
-50 + 2 * F = 30
2 * F = 30 + 50
F = 40.

If 15 females are absent, then number of males will be twice
that of females.
40 - 15 = 25.
50 = 2 * 25. Confirmed.

If also 45 males were absent, then female strength would be
5 times that of males.
Female strength is 25 due to the 15 females being absent.

50 - 45 = 5.
25 = 5 * 5. Confirmed.

There are 12 boys and 15 girls, How many different dancing groups can be formed with 2 boys and 3 girls. Which of the following fractions is less than 1/3?

1543

---

A person travels 12 km in the southward direction and then travels 5km to the right and then travels 15km toward the right and finally travels 5km towards the east, how far is he from his starting place?

1170

---

The size of a program is N. And the memory occupied by the program is given by M = square root of 100N. If the size of the program is increased by 1% then how much memory now occupied?

1531

---

A and B decide to speak truth or lie on a day. Another person asks A if he is saying truth or lie. B listens to A whatever he answers. Now the person asks B what A had told. B replies as " A has told that he is a liar". What does B say?

1210

---

A boy has Rs 2. He wins or loses Re 1 at a time If he wins he gets Re 1 and if he loses the game he loses Re 1. He can loose only 5 times. He is out of the game if he earns Rs 5. Find the number of ways in which this is possible?

1327

---

Y catches 5 times more fishes than X. If total number of fishes caught by X and Y is 48, then number of fishes caught by X?

1277

---

modulo(373,7)+round(5.8)+truncat(7.2)-round(3.4) = ? i exactly don't remember the truncate function.but the function was where we skip the '.' part.

1204

---

what is diff b//w the singly reinforced beam,doubly reinforced beam?

1793

---

Aeroplane is flying at a particular angle and latitude,after some time another latitude is given..(8 hrs later), You are asked to find the local time of the place.

1111

---

9 cards are there. you have to arrange them in a 3*3 matrix. cards are of 4 colours.they are red,yellow,blue,green. conditions for arrangement: one red card must be in first row or second row.2 green cards should be in 3rd column.Yellow cards must be in the 3 corners only. Two blue cards must be in the 2nd row. At least one green card in each row.

1154

---

In the word ORGANISATIONAL, if the first and second, third and forth, fifth and sixth words are interchanged up to the last letter, what would be the tenth letter from right?

1825

---

Find the hypotaneous of a right angle isoceles triangle whose area is 50.

1335

---

if the radius of the circle is increased by 6% then its area increased by

1151

---

A person sold two articles for 80 /- each.with 20% profit on one article and 20% loss on another article, what is the loss / profit he will gain on both.

1171

---

Given 10 alphabets out of which 5 are to be chosen. How many words can be made with atleast one repetition.

1228

---