The names of 18 Geo-scientists and 20 Astro-physicists are selected to form a team of 10 scientists. But among them cannot join as they already left for the space mission.In how many ways can the team be made now?
Cannot be determined
Note the following:
The formula for the combination for the selection of the items from the different items is
The restricted combination for the selection of the items from the different items with particular things always excluded is
Since 7 scientists must never be included in the team, the following is evident.
The number from which the restricted combination is to be made is .
The number with which the restricted combination is to be made is
Therefore, the required restricted combination is.
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