Question
A man has 15 friends out of which 7 are his relatives.
In how many ways can he invite his 9 friends in which at least 5 must be his relatives?Solution
relatives =7, not relatives = 15-7=8 You must invite 9 friends, out of which at least 5 must be relatives. You can invite in the following way: 5 out of 7 are related and 4 out of 8 are not related or 6 out of 7 are related and 3 out of 8 are not related or 7 out of 7 are related and 2 out of 8 are not related. =7C5× 8C4 +(7C6×8C3) +(7C7×8C2) =1470+392+28=1890.
On August 18, 2017, which Asian country launched its first cyber court specializing in handling Internet-related cases?
Which of the Indian enterpreneur has topped the 'IIFL Wealth Hurun India 40 & Under Self-Made Rich List 2022'?
The board of a cooperative society can be superseded or kept under suspension if:
1. There is negligence in the performance of duties.
Which of the following Indian cities is included in the list of 'UNESCO World Heritage Sites'?
 Which of the following is NOT eligible to use UPI for payments?
Which of the following festivals is celebrated as the birth anniversary of Guru Nanak Dev?
Match List-I with List-II
In _________, BR Ambedkar negotiated the Poona Pact with Mahatma Gandhi.
First education satellite launched by ISRO is _________.
Under the revamped PM Awas Yojana (Urban) 2.0 scheme with a total outlay of ₹3.06 lakh crore, what is the cost-sharing ratio between the Centre and St...
Relevant for Exams:
