The mean of 10 observations was calculated as 40. It
was detected on rechecking that the value of 45 was
wrongly copied as 15. Find the correct mean.
The cards bearing letters of the word “MATHEMATICS”
are placed in a bag. A card is taken out from the bag
without looking into the bag (at random).
(a) How many outcomes are possible when a letter is
taken out of the bag at random?
(b) What is the probability of getting
(i) M?
(ii) Any vowel?
(iii) Any consonant?
(iv) X?
The probability of getting a number greater than 2 on throwing a die once is _________.
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