From among the given alternatives select the one in

If four hats are picked at random, what is the probability that one is green, two are blue and one is red?

Which of the following mathematical operator are placed in place of alphabet given in the equation to make it true?

54 a 7 c 9 f 45 h 12 j 15

If 34 – 28 means 952, 544 + 8 means 68, 20 ÷ 5 means 25, 20 x 10 means 10, then 375 – 11 x 270 ÷ 550 + 11 x 35 = ?

Select the correct combination of mathematical signs that can sequentially replace the $ signs and make the equation correct.

54 $6$ 2 $12$ 24 $ 6

Select the correct combination of mathematical signs to replace the '@' signs and balance the given equation.

22 @ 6 @ 18 @ 17 @ 2

Select the correct combination of mathematical signs that can sequentially replace ‘*’ sign and balance the equation given below.

If × stands for 'addition', ÷ stands for 'subtraction', + stands for 'multiplication' and - stands for 'division', then 31 × 18 ÷ 20 - 5 + 9 = ?

Which two signs should be interchanged to make the given equation correct?

8 – 42 + 15 × 20 ÷ 4 = 346